I decided to invest ina new mattress because I was having trouble with my back and the old mattress I had was terrible. After much research, and trying it out in the store, I decided on Adapt Medium Hybrid. My back pain got worse. When I wake up, I am so uncomfortable that I have to do a series of stretches to unkink my body. I am returning it. Unfortunately, the base is non-refundable. I'm just hoping the next mattress is better.