Only buy the Sealy Broadwood Ortho Extra Firm Mattress if you've slept on extra firm before and liked it. For everyone else, and side sleepers above all, it's harder than you need, and the word "Ortho" in the name is no reason to go this firm. Sealy is a brand I find bland, this is a Bensons-only model, and I'd rather put the money into a well-specified pocket-sprung mattress.
The people it suits are heavier back and front sleepers who already know a hard surface works for them. Firmer-is-better-for-your-back is the most expensive misunderstanding in the trade, and a label with Ortho on it is where most people fall for it.
A tufted, extra firm spring unit with a stiffer centre
The core is Sealy's PostureTech Core Support spring system, which Sealy says gets firmer the harder you press on it, with a PowerPack zone reinforcing the middle under your hips and lower back. On top are fibre fillings (Smartex and recycled ReNew fibres) under a Belgian damask cover, hand-tufted right through, with Sealy's EdgeGuard round the border. It's 27cm deep and non-turn.
Read that as a hard, structured surface. You'll lie on top of it, the tufts pull the fillings tight, and the stiffer middle stops your hips dropping. A heavy back sleeper wants exactly that. Anyone lighter won't, because a hard bed only feels supportive if your body is heavy enough to press into it. Sealy doesn't call this a pocket spring unit, and pocket springs are what I'd want for the money.
The cover's ProShield treatment is endorsed by Allergy UK, which is a named scheme and counts for something if that's on your list. I'd take the cooling claims for the fibres more lightly; your duvet does more for your temperature than a fibre with a cool-sounding name.
What the unhappy owners say
The reviews on this listing mix in owners of other Sealy models (several mention a winter side, which this mattress doesn't have), so read them for themes across the range. Most owners are happy, and plenty bought it hoping a firm bed would help their back. Read the three-star reviews, though, because five stars is the honeymoon. The complaint that comes up most is dipping: owners describe a dip or a ridge forming where they lie, some of them within weeks, even after rotating it as the care guide says.
Firmness is what owners talk about most, and they split: many find it as firm as described, several found it less firm than they expected, and some found it harder than they wanted, from "a bit firm for me" to one owner who describes bruised hips and feeling every spring through a topper. One owner who liked the support still found the reinforced middle pushed up under the hips. Some mention feeling the tufting buttons through the sheet, and others say a partner's movement carries across the bed. None of that surprises me on a tufted, extra firm unit, and it tells you who should stay away.
Who should skip it
Avoid it if you sleep on your side; an extra firm surface pushes back hard at the shoulder and hip, and in my experience a too-firm bed is the usual reason a side sleeper wakes up aching. Avoid it if you're under about nine stone, because medium-firm already feels like a plank to a light sleeper and this is two steps past that. And avoid it if you share with someone lighter than you who likes a softer bed, or one of you will be sleeping on the paving slab.
What to buy instead
If you like the Broadwood but aren't sure about extra firm, Bensons sells the same range as the Broadwood Ortho Firm Support, a step softer. Better still, a medium-firm pocket-sprung mattress with a proper comfort layer is where I'd start almost every back sleeper, including most of the people who walk into a showroom asking for orthopaedic.
