I have the BA Air-Core air mattress - coffin shaped, insulated, extra long. I think it's a big improvement over Thermarest. I have back problems exacerbated by sleeping on backpacking mats. It's less painful with the Big Agnes. It packs smaller and weighs about the same as my old 3/4 Thermarest, and my legs are off the ground. It takes me 2 minutes of easy blowing to inflate it.