Yep, personally I find closed cell or thermarest on the ground to be really not much different (except for like the huge-o-too heavy for backpacking type thermarests) I do find my BA aircore pretty decent, but again, I'm big and a side sleeper, and I find I do best in a hammock. But I think it really depends on you, and how your back is "bad" - and whatnot, the nice part is that there is enough variation out there that most people should be able to find something that works for them.