Very comfortable, but less comfortable the lighter you get

In general, this is a comfortable mattress. However, when I initially picked out this mattress and thought it was super-comfortable, I weighed 75lbs more than I do now. It didn't dawn on me that I would probably need a different mattress for a different size (stupid of me). My main issues are my hips and shoulders aren't sinking far enough in the mattress so my spine isn't straight. If I raise the head of my adjustable bed a couple of degrees when sleeping on my side, its much better. I'm exchanging it for the Half Moon and keeping this one for my guest room (for 1/2 off).