This is a really comfortable, good quality mattress. When it arrived (in an amazingly small box), the mattress was well wrapped up in plastic and there was a little tool to slice the plastic open without slicing the mattress, plus instructions for the mattress. It was simple and straightforward and the mattress was ready to sleep on in just an hour or so. There was no obvious chemical smell, just a slight whiff if I put my nose right on it as soon as it came out of the wrapping. I haven't been bothered by any smell when sleeping on it. I bought it as an urgent need because the old one was giving me back pain. After two nights on this mattress, the pain was gone and i've had a couple of weeks of very comfortable nights with much better sleep so far. The only thing i'm not so pleased with is the edges squish down when you sit on them. I guess they have to in order to fit inside the small box but I prefer the edge of a mattress to keep its shape when I sit on it. It's not a major problem as I sleep alone but if I shared it and had to sleep near the edge, i'd feel as if I was going to roll out of bed. I'd want a king size if I was to share it. I will also get a mattress topper just to increase the comfort factor even more (and to fulfil the conditions of the guarantee). Overall, I am very happy with this mattress, it's great to feel comfortable and well supported. With the discount, it's amazing quality for the price. So glad I bought it; my back thanks me every morning.