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Simba vs Sealy Mattress Reviews

Compare Simba and Sealy mattresses side by side: owner satisfaction, support, durability and price, based on aggregated customer reviews.

Checked byBecky Reeve, Staff Writer, Mattress Expert
SourceCompiled from WantMattress review data

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Brand

Simba

Our pick
Overall score4.8/5
Price range£399 – £2,399
Brand

Sealy

Overall score4.7/5
Price range£298 – £3,900

On aggregated owner reviews, Simba scores higher: 4.8 against 4.7 out of 5.

Becky’s take

By Becky Reeve

Checked against current models and prices in October 2026

Simba is my answer for most people, because Sealy is a huge catalogue and most of it is bland. Most of what it sells in volume is firm or extra-firm open coil, and the Mellbreak and the Steeple Ortho Plus are its biggest sellers. Orthopaedic is the word I'd most like struck off mattress labels, because it mostly means harder than you want. A Simba Hybrid is foam on a pocket-spring unit, medium or medium-firm, tried at home. For an average-weight back or side sleeper it's the better bed.

Two kinds of sleeper should still pick Sealy. The first wants latex. The PostureLux, Newton and Bronte models are latex builds, cool and bouncy, and Simba has nothing like them. Hardly anyone tries latex and most who do never go back. The second is anyone well over eighteen stone who needs properly firm support, because Simba stops at medium-firm.

Simba's hybrid is excellent, whatever its silly names suggest, but the list price is too high between sales, so wait for a drop. Sealy is on sale permanently too. Judge the price you'd pay today, not the crossed-out one.

Head to head

Simba has sprung throughout, with pocket springs or a hybrid build in every model; Sealy has 20 of its 57 mattresses sprung and 8 all memory foam. Simba runs from medium to medium-firm, and Sealy runs from soft-medium to extra firm. Sealy covers more of the firmness scale, which helps if two sleepers need different feels. Sealy is the cheaper way in, though not by much. But at the top end Sealy goes further, so it also has the more premium options.

How they differ

SimbaSealy
Mattresses we list1057
Price range£399 – £2,399£298 – £3,900
Owner rating4.8 out of 5 (12,329 reviews)4.7 out of 5 (10,404 reviews)

Mattresses only. Ratings are the review-weighted average across each brand’s mattresses on UK retailer sites. Prices read 17 October 2026.

Simba

Simba have been in the bed-in-a-box industry since 2015. Simba started its journey with one mattress before branching out to encompass an entire range. These aren’t just any mattresses though, and they have been tested using data from ten million sleepers’ body profiles and over 100 prototypes to help ensure that the mattress and its design will suit the vast majority of sleepers. To date the Simba lineup has become one of the most well-reviewed mattresses worldwide and with the new line-up, there's different models to suit different budgets.

Simba has an entire lineup dedicated to bed in box rolled mattresses. This avenue to market has become increasingly popular in recent years and has numerous benefits, namely that the cost of the product is typically lower due to savings within logistics warehousing and delivery.

Sealy

Sealy has formerly separated from Silentnight, who once managed the UK arm of the popular retailer and will now be re-acquired by Tempur Sealy International. For those who don’t know, Sealy is the world's biggest bed brand that’s not down to luck, Sealy mattresses are highly regarded and at a price point that is achievable for the vast majority of people. What’s more, the company produces handmade beds right here in the UK using some of the finest fillings and upholstery.

Sealy’s Posturepedic technology makes it ideal for those with back and neck pain looking for that additional bit of support, becoming the only partner to be approved under the Orthopaedic Advisory Board

Simba owner satisfaction

Satisfaction for Simba is high on their priority list, offering an impressive comfort guarantee which means that if you are not 100% satisfied with your purchase you are able to organise a return for a full refund. The return process is one of the easiest we have come across and involves letting the company know and they will arrange collection at a time convenient to you. Additionally, there are no additional surcharges, costs or delivery fees associated with the returns process which means you get 200 nights risk free to try the mattress.

After this trial period you will also receive a 10 year guarantee that will further instil confidence and ensure your investment is protected long term.

Simba supportiveness

Simba have multiple mattresses in their range, however all offer roughly the same level of supportiveness coming in at a medium firm tension. The comfort that you derive from a mattress will generally come from the top layer that sits somewhat detached from the support layer. The support layer is what contours and fights against your body to give you pressure relief. Depending on how you sleep or how much you weigh are both factors in determining suitability of tension. With the medium firm support of the Simba lineup we find them most suitable for back sleepers and those of average or heavier build. That said, due to the inclusivity that Simba has aimed to achieve through its prototypes and extensive testing, we do have plenty of reports of side sleepers and those who are lighter getting maximum comfort out of the lineup.

Simba durability

People are increasingly expecting more from their mattresses with more comfort and more support on offer than ever before. It’s actually a really great time to buy a new mattress as companies new and old are changing the way they do business and produce mattresses with improvements and savings along the way. The same has become true for durability and while the average lifespan of a mattress before being replaced currently lies at around 7 years, the Simba goes above and beyond with a guarantee covering a full 10 years. The result of mattresses lasting longer is the cost of sleep actually decreases relative to cost and time meaning products like Simba may be cheaper in the long run due to that enhanced and increased durability.

Simba best offers

We've managed to find the following top deals from across the web on Simba mattresses.

Sealy owner satisfaction

Satisfaction is at the heart of what Sealy offers. Since their inception Sealy has offered numerous different base and comfort layers to try and appease all areas of the market. The company has largely remained successful in their plight thanks to their strong support within the mid-tier market. Owners are mostly happy with what they bought, and comfort is the thing they mention most often. Back pain easing comes up as well, with one owner writing "my backache has virtually disappeared now". The complaints are far fewer, and firmness is the main one: some owners found theirs harder than expected and a smaller number softer, with one calling it "Harder than the model we tried in the shop". Dips forming where people sleep are the other complaint that recurs.

Sealy supportiveness

The Sealy lineup includes everything from soft-medium through to firm tensions. The most popular in the range are the mediums which give the best overall support for most people, pairing well with the pocket spring support layer to offer full body contouring for all-round support without feeling too-firm.

For those looking for a bit more support, Sealy has firmness grades exceeding firm and entering extra-firm territory. We would personally recommend these only for specific circumstances as comfort is reduced slightly to better aid support.

Sealy durability

When it comes to durability Sealy performs in line with expectation. We do see a bit of fallout from some of the cheaper in the range, particularly the open coil sprung models which, combined with a single sided comfort layer often do not have long-lasting properties and may not afford as good value as initially perceived due to their reduced operating lifespan. Contrary to this is the excellent pocket sprung options on offer from Sealy, particularly when paired with a double sided comfort layer. A combination of these will ensure you get a long standing mattress that will last far better and in-line with the average expectancy where people typically look at replacing their mattress (7 years)

Sealy best offers

We've managed to find the following top deals from across the web on Sealy mattresses.

Owner reviews of Simba mattresses

5 Anna B.

We've been needing a new mattress for a long time, to replace our turn of the century Sealy memory foam mattress and divan bed, which we have had lots of use from (2nd hand from family when we got it). We wanted to invest in a really high quality, low environmental impact mattress (and bed) that also ticked all the boxes for comfort, support, no nasty off-gassing chemicals, made with natural materials and market leading durability. This was a huge outlay for us and we've been thinking about it for a few years. We're now in our mid 50's and know that a good night's sleep is crucial, particularly as I'm a light sleeper and have suffered from back and hip pain in the past. Our old mattress was smelly, well past its prime and I dread to think what might have been living in it (and on us!). So, we see this new Simba mattress as an investment for our future. Lots of really helpful info on the website and very enticing video of the mattress we were considering. Once we decided to go for it, we had a bit of trouble paying for the order on the website as I couldn't figure out how to set up the credit facility to spread the cost. In the end I had to message Simba about it and soon after was given the option of having a callback slot, at a time to suit me, to speak to a person. The customer service chap rang me at the allotted time and was very helpful and polite, who helped us resolve the issue, with the added bonus of a further code to use to get free collection of our old bed and mattress, which saved us £50, that really made us happy. We are very pleased with the promotional offer of free high quality Simba bedding as well (2 pillows, duvet and mattress cover), so felt that although it was a big expense, we were buying the best we could afford and were being treated very well as customers. Following the email confirmation of the order after purchase, a day or two later we received details of the VIP service delivery and the date suggested worked for us. So, within a week of placing the order we would get our new bed and mattress (we live in rural Wales, not that easy to get to). Two gentlemen from the delivery company arrived on time, carefully backed up their van on our narrow driveway, carried in the bed and mattress with care, they were really polite and quietly got on with the job of building the new bed. They would have removed the packaging too, but I asked if we could keep it, no problem at all! They removed our old bed and mattress and so within the hour of their arrival we were all set up with our new bed and mattress. Fab! The mattress is very different to our old memory foam one. It's much deeper, heavier and firmer. I'm a side sleeper, but occasionally sleep on my back. It did take me a few days to get used to the new firmer support, but it does have lovely soft cushioning in the top layer. After a few weeks we are now feeling much more comfortable on it than we did initially. I can feel it does give me much better support, as am not getting back pain from sleeping on it. My husband really loves it. According to our Fitbit watches, which we wear at night, we are generally getting a good quality night's sleep (we just need to get to bed earlier now to make the most of it!). For me, with a very sensitive sense of smell, there is also a slight scent of sheep wool, which was stronger to start with. I actually like this smell, and it reminded me what the mattress contains, natural fibres, not off-gassing of chemical VOCs. But, we do make sure we air the bed each day, which is good sleep hygiene, whatever mattress you're on. The mattress comes with helpful information about how to care for it. It definitely will need two of us to turn it every so often, way too heavy for me on my own. I do find changing the bedclothes harder work, as the mattress is heavy to lift to get the fitted sheet on it, especially at the head end. So bear this in mind if you live on your own and you order King Size! You also need to use extra deep fitted sheets. We hope that it'll remain this comfortable for the next 10 years, reassured by the guarantee and love the fact that the mattress was made only a couple of weeks before we bought it (the label on it states when it was made). Nice to think it's not been sitting very long in a warehouse somewhere before we received it. Lovely to know that its recyclable at end of life too and we're supporting a certified B Corp. Fingers crossed we'll both be still sweetly sleeping on it well into our 60's.

4 Martin D.

So, two weeks ago, I got a response from the supplier of my previous mattress (Emma) saying that due to some sort of restructure, they wouldn’t be able to deliver a new mattress for weeks. They gave me the option to get a refund, which I took. I needed the mattress by that Sunday at the latest as that’s when my temporary accommodation in the Airbnb that I was staying at came to an end and I needed to sleep at my new less-temporary, but unfurnished accommodation. My previous mattress had been damaged by the water ingress at Coniston House (google it for stories in the Standard and The Slice, Tower Hamlets if you're interested). The ongoing works on my building necessitated the move. Anyway, I found a roughly equivalent mattress sold by Simba, which is UK-based and B Corp certified. It is a bit more expensive, but hey, it was an emergency and they offered to deliver the next day if ordered before 1 p. m. This is when it all went horribly wrong. Simba sent the mattress by DPD and DPD’s tracking showed it was out for delivery. The delivery slot came and went and then the tracking said they were running late. Phoning DPD to find out what was going on, they reassured me that they would deliver it that day, but it appeared from the tracking that it had gone back to the depot. I waited in until 8 p. m. The same thing happened on Friday, the contact centre reassured me that it would be delivered, but tracking I could see showed that it was still at the depot. I eventually got a call back from the depot who said it wasn’t out for delivery after all and wouldn’t be delivered that day (despite what the call centre had said). DPD booked it in for a Saturday delivery. Saturday came, again, the same pattern and no delivery. The DPD contact centre doesn’t seem to have any way to contact people on the ground, and I won’t call it lying, but they make statements (e. g. that they will certainly deliver today) which they clearly don’t have the information to back up. On the Monday, I had an exchange with Simba, who arranged for the delivery with DPD to be cancelled. I had to go to the office on Tuesday (I had already spent several days trapped working from home by DPD), so Simba arranged to send out a replacement with ao. com’s logistics on Wednesday. On Wednesday, Garry from AO called me first thing to say he was delivering that morning, and he called again when he was on the way from his previous job. Delivered direct to my door, no fuss. It seems from other reviews of DPD that mattress delivery and other heavy/bulky items are a recurring problem for DPD. I would give Simba five stars, especially for fixing the mess as promptly as they could. However, it was their choice in the first place to use DPD where there appear to be known issues with their performance. If Simba turn to using AO for all their deliveries, I would give them an unqualified recommendation as the mattress is super comfortable and their customer service is helpful and responsive. Most importantly, over the last week, I've had the best night’s sleep I’ve had in over a year!

2 Maria T.

Despite Simba resolving delivery issues caused by a very dishonest courier, they were also very quick to treat me as though I was lying about not receiving my £1,800 order. Whilst I understand there will be some apprehension due to other dishonest customers, there was no need for the passive aggressive emails and chat messages I received. As soon as I said I lived within MOD barracks and there was no record of the delivery truck or drivers, they sent out a replacement order immediately without explanation. For the mattress itself, I must say that both my husband and I don’t feel it (or the pillows/duvet/mattress topper!) are worth the high prices. We’ve tried to give it time as they say it takes a while to get used to a new mattress, but I really expected to be wowed by a mattress that costs so much, and I’m just not. There are already significant flat areas where my husband and I sleep, despite rotating as advised, which only happened with our old mattress after around 8 years. The pillows come with extra foam cubes so you can fill them more and thus make them firmer, which is great in theory, but I can feel the bumpiness of the cubes under my face, despite distributing them and shaking the pillows etc. Not to mention the fact that the pillows cost so much and are literally just filled with cubed sponge. The quilt is fine, it’s neither here nor there, the buttons can be felt through your duvet cover in the corners which is mildly annoying but the best part is this retails at £399…! The mattress topper is, again, neither here nor there. We tested the mattress without it for a night and it felt exactly the same, so I’m not sure what it really adds. The only good thing I can state about the mattress is that it’s a great level of firm for us (we prefer a more firm one), but again, the cost is not worth this alone, and I’m fairly certain I’d be able to find another for half the price and that feels the same. Sorry, Simba. I will add that we also purchased two inter mattresses for our kids and these are lovely - kids have commented how much they love their new beds and how comfortable they are, which was really important for us while they’re still young and growing. Perhaps we’d be best returning the Luxe and getting an Inter.

1 Stephen P.

Sadly, I cannot recommend Simba based on my experience. I ordered a mattress advertised as being 25 cm deep. The first mattress I received measured approximately 22 cm. It was only after raising this with Simba that the ±2 cm manufacturing tolerance became particularly relevant. This tolerance is contained within their Terms & Conditions, but in my opinion it is not made sufficiently clear alongside the advertised mattress dimensions when purchasing. A ±2 cm tolerance on a 25 cm mattress is actually quite significant — potentially anywhere between 23 cm and 27 cm — and I think this should be made much more obvious to customers before they buy. Even allowing for that fairly generous tolerance, my first mattress at approximately 22 cm was still outside Simba's own stated specification, so they agreed to replace it. Unfortunately, the replacement mattress measured approximately 22.5 cm — once again outside their own stated tolerance. Despite this, I was then told that the 22.5 cm depth was fine and would not affect the performance of the mattress. This completely misses the point. If a product is prominently advertised as being 25 cm deep, and the manufacturer already allows itself a ±2 cm tolerance, I don't think it's unreasonable to expect the product supplied to at least fall within that range. I specifically needed a 25 cm mattress, which was one of the reasons I chose this particular model in the first place. After receiving two mattresses outside even their own stated tolerance, Simba were unable to guarantee that another replacement would meet the advertised specification. I was therefore left with the only realistic option of returning it for a refund. My experience has left me with very little confidence in the accuracy of Simba's advertised dimensions or their manufacturing quality control. I own foam mattresses from other manufacturers that measure within just a few millimetres of their advertised dimensions. By comparison, receiving two Simba mattresses that were both outside even Simba's own ±2 cm tolerance suggests to me that their manufacturing and quality-control standards are simply not good enough. If a mattress is advertised as 25 cm deep, customers shouldn't have to search through Terms & Conditions to discover that it could actually be several centimetres different — and even then receive a product that falls outside that tolerance.

Owner reviews of Sealy mattresses

5 T Phillips

I’ve been sleeping on this mattress for a few nights now and I’m pleased to say it’s making a positive difference. I was hoping for something supportive and comfortable, and this mattress delivers on both fronts. What I like The medium-firm feel hits a nice balance: not so hard that you feel like you’re lying on a plank, yet firm enough to feel properly supported. The product’s description calls it “medium-firm” and highlights the balance between support and plushness. The cooling feature is visible: the mattress uses INFUSE™ Black Diamond Graphite foam (which I must admit sounded fancy to me) to help with temperature regulation. According to the spec it “keeps you cool while cushioning your hips and back”. On warmer nights I’ve noticed I’m less restless. Excellent support for back and hips: I wake up without the usual niggles around the lower back and shoulders that I used to get with older mattresses. The “AlignSupport® coils” and plant-based ComfortCore layer appear to be doing their job. Good edge support: the mattress doesn’t feel as though you’ll roll off when you get close to the edge, and the usable surface feels generous. That’s helpful when two of us are sharing it. Quality and build: the cover feels robust, the stitching seems neat, and while I won’t pretend to have dismantled it, it gives a sense of quality rather than a bargain compromise. Where there’s room for improvement (or things to know) It’s a bit heavier/setup-intensive than my old one: rotating or manoeuvring it takes a bit of effort. If you prefer a super soft, sinking-in feel (the “body-hug” kind) this mattress might feel a little firm. Some reviews of the same family of mattresses note that side-sleepers (especially lightweight ones) might find medium-firm less contouring than they’d like. As with many new mattresses, there was a short adjustment period for my body clock and sleep-muscles to adapt. The first two nights felt slightly unfamiliar; by night three I was into it. Cooling is better than my previous mattress, but if you’re a very hot sleeper I wouldn’t say it’s magic. The spec claims better temperature control but some users of related models still noted some heat retention. Verdict In my view this is a strong pick if you want a mattress that blends support with comfort, especially if you’ve got a back that lets you know when the mattress is doing a poor job. For someone like me (part-time mystic, allotment keeper, old bones) it feels like a good investment in sleep rather than just a piece of furniture. I’d say I’m waking up more rested, and that alone makes the change worthwhile.

5 Jeffrey N

Lying on a bed in a shop fully clothed for a few minutes is one thing. Lying on it for 8 hours in thin nightwear is something else. I tried the Newton bed in the shop and it seemed comfortable, although it may have been there years and hundreds of customers may have bounced on it. Once delivered (and Bensons were totally professional in that regard) I got backache after one night. Others have remarked their bed seemed firmer than in the shop. Dreams sell the same mattress but they call it Hagen and rate it very firm which it certainly is. I found I could get my hands behind the small of my back and exactly the same when I lay on the floor !! I also got cubital tunnel syndrome (hard bed pressed on shoulder and elbow causing pain down arm and little finger went numb !) A topper improved things a bit but if you need a topper to make your bed comfy you're probably lying on the wrong bed ! After a week of pain I decided to switch to a medium Newton which you wouldn't know existed if you only went in the store and didn't look online. I zoom called Bensons HQ who confirmed none of their shops displayed it. So why didn't I order a medium in the first place ? I didn't like the idea of buying a bed I hadn't tried first (if that is any guide) but in the end I was forced to ! Now medium doesn't mean soft. It just means slightly less firm !! I phoned Sealy HQ who explained the only difference is Newton Medium has firm and medium foam, not extra firm foam like their firm version. I'd give Newton firm a 9/10 rating for firmness and Newton Medium 7/10 although that may ease to a 6 in a few months. Incidentally I did consider the Bronte too. I had a pillow top but found it got frayed and torn after 6 years (I'm a restless sleeper), was heavier to turn, higher and the sheets didn't fit. As others have mentioned I found it warm to lie on after just 10 minutes so wondered how hot it would be after 8 hours. To be brutally honest I didn't think it worth an extra £400 which is a lot for a pensioner ! If you want a soft top buy a mattress topper for the Newton Medium and save yourself the extra expense. A final point, I found the Newton Medium somewhat lighter than the firm, probably due to the lack of hard heavy-duty foam.

1 Mr R

Absolutely horrible. This is a completely unbiased review after owning it for almost 4 months now, and rotating it around as per instructions. After trying out a few beds in various stores and doing some research into the kind of bed I wanted in an Extra Firm, this was one was the best *when I tried laying down on it in store*. However, when I received this, it felt like a completely different mattress - soft, pudgy, sinks down in the middle (what Central zoning PowerPack/lumbar support technology? Is this a scam?) and downright uncomfortable. I got this to help with a back injury I suffered a while back, so that means solid support that keeps that back held up firm, but this was the opposite, and the softness of it actually caused me more pain and discomfort in the long run. EdgeGuard - newsflash: it has no EdgeGuard support or technology in it. You roll off the edge just like on a standard mattress. Extra Firm rating: Nothing more than a lie. There is nothing about this that could classify it as extra firm. Other than its bad quality, the firmness rating would be medium to firm. Definitely not Extra Firm, and it was definitely not the same mattress I tried in store. The only positives were the delivery crew were amazing. Top lads. I really regret not going with my initial option from mattressonline, which had the same specs and was cheaper too. I would not even pay £200 for this rubbish.

1 Paul M

In the store this was the most comfortable mattress. We tried nearly every mattress in the shop. The selling point was the construction of the mattress and the salespersons insistence this was one of the most popular and highly rated mattress in the U.K. We bought the mattress and the delivery was arranged. First class service. Once the mattress has been delivered and the packaging removed, the smell was overpowering in the room. This was described to us as the mattress "off gassing" and the smell would dissipate within 48 hours. Luckily we have extra bedroom so it was left to vent its gasses. Two weeks later I decided to make up the bed even though the "off gassing" was still there.We have slept in it once, my wife who suffers from asthma now sleeps in the spare room. She awoke in the night in a coughing fit. I am trying to use the bed myself but I wake up with this smell wafting from the bed. This smell was not evident in the showroom. The current advice is to place it in the garage to air properly. I am so angry about this mattress. It's a shame because we have used bensonforbeds regularly and never had any issue before. This mattress will be withdrawn from sale if they want loyal custom.

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