It's super comfy and weighs under a pound. Rolls up to a very small size. Only trouble is it's not insulated so it can make for cold nights when the temps dip into the 30's. Above 40 degrees it's fine.
I'm looking forward to trying the NeoAir pad due out next month:
Thermarest and a $5 foam mate. Works great and I never want to get up. It's light and not too bulky. Having the foam mat holds up my pack on put on the ground.
I just converted to the Exped DownMat Pump 7. I have back problems and have trouble sleeping through the night. It should help. I'm having troubles justifying the weight. It's 1068 grams. But in the end, I get a bad back sleeping on just a thermarest. So I had to do something.