After sleeping on a lumpy mattress and enduring back pain for years, I finally bought a new one. I cannot believe how comfortable it is! There is one slight problem though. I upgraded my full to a queen and the bed frame is adjustable from a full to queen. All right so far. Well, the side rails are 4 inches too short! So, I had to pile the mattresses on the floor till I can go out and try to find new side rails. Hopefully this will be solved quickly and painlessly.