I have had 2 back surgeries on herniated discs (I am only 36) and remember reading that a firm mattress is what is recommended for bad backs. So I bought a Sealy Posturpedic Firm matress before my first surgery in 2010. I thought is was great. The the second surgery came and the matteress seemed to work well then too. Recently, I found myself unable to lay on my back and since surgery never able to lay on my stomach (it's bad for you whether you have a good back or not). I was only able to sleep on my sides. You can understand how that could get very annoying and tiresome even for my shoulders. So I looked into getting a mattress topper thinking that it would conform to my back and allow me some better rest through the nights. I bought this 3 inch topper because I read that people usually by 2-3 inch toppers for comfort. I got this topper and thank the Lord, was able to sleep comfortably for the first time in months. I sleep on my back and it supports the natural curvature of the spine. I feel enveloped when on my sides. It is so comfortable!!! I had no problems with any funky smell that people claim they have with these toppers. If you are debating about whether to get this, why not try it? It worked for me and now my family members are considering getting one for each of their beds too. Nighty night!