I hardly ever use mine on the ground for cushoining. It's normally in my hammock for insulation. When I go to ground with it I look for a soft spot. mind you, I've never found any blue pad that gave any appreciable amount of cushioning for me - my BA insulated aircore, yes, some, but below that level of cushiness, to me it doesn't much matter - yes a thermarest is a little softer, but doesn't appreciably change my sleep.

Having said that I *have* slept on the ground more than once on my walmart pad, and it was "ok". I I picked a softer spot and did allright. Course, mine's the 27" wide variety for hammock use, so I don't know if it's even the same as the pad you're talking about. The stuff there changes a lot.