I agree with the reviews that say this is a very firm mattress. None-the-less, very comfortable (if you like firm) and you sink right in after a minute. I haven't had a bad night's sleep yet. Neck pains and back pains are gone. I didn't notice any strange smells like some of the other reviews. It also stays very cool and seems like it "breathes" better than most mattresses; this is my first memory foam mattress. Since it is firm, I have it on a platform bed (slatted). My previous mattress let me crack one of the slats, but this mattress has saved me.