This mattress is the best buy I've made in a LONG time! It's comfortable and firm, which I like. It unfolded right away, except for a slight hump in the middle, but that fell out over a couple of days. There was an odor, but it was gone within a couple of days too. I'm 77 years old, and I have trouble sleeping because of bad hips, but this is so comfortable I've gotten a lot more rest.