After reading many online reviews, I decided to give the GhostBed Flex a try. My back is sore every morning when I wake up and , unfortunately, the GhostBed did not solve my problem. This is the third expensive mattress I have tried in the last four months and the result in all cases has been the same. I have come to the conclusion that the mattress is not the problem. I find the mattress very comfortable until I get up in the morning. I believe it is an excellent product. The purchase, delivery and set-up all went well.