I like the z-lite a lot. As said, very durable; no problems with the folds or the bumps. The bumps are a bit wrinkled and obviously not new, but they don't seem to have lost much or any comfort. I'm not shy about using it on the ground when lounging; that's one of my favorite things about CCF versus my heavier self-inflating pad.
I sleep on my back when I'm asleep but need to be on my side to fall asleep, so on hard, oft frequented campsites, I have problems. A simple solution is to fold the z-lite so that there's two or three sections under my hips. I bought a full length pad and cut it so that I have one 9 section pad and one 5 section pad; 9 is enough for my torso when the last two are doubled up, or a bit extra if not. But the best solution is site selection; camp on a surface that's comfortable to begin with and then add more cushion with the z-lite. Not always doable but it's a cornerstone of UL technique in my opinion.