This mattress is, as the other reviews say, a little firmer than I thought it would be. It's not like sleeping on something hard - it's still a nice memory foam mattress - but I don't melt into it the way I do with some of the more expensive ones at the showroom. For the price though, this is lovely! It didn't smell. even when it first arrived, but the packaging had been damaged and it had started to expand, so perhaps it had started to breathe, too. IT definitely didn't take the recommended 72 hours to expand! It was more like 72 seconds! Overall, I'm happy with the purchase.