We have a temperpedic the really firm one. I have to because of joint and back issues. It is overly firm I think unless you need that. Also we have a split set and I am not keen on the cold air comming up through the center crack. If I had to do it again I might go for the one size one instead of the two pieces. I do like being able to set the frame so my legs can be up etc. In the winter the matress if cold and in the summer it si sweaty. Kind of a problem with foam matteresses. Overal it has been good because of my joint issues.