Beautiful and firm like I wanted was the Therapedic I-care bliss full size mattress. The back was feeling great for a short time, until the mattress valley started to appear in the middle of the mattress. After (2) two months, the valley could be noticed, and I have pictures. It is (5) five months since sleeping on this mattress and the valley in the middle of the mattress is getting deeper. I am a 160/165 lb. single male and this should not happen.