Brilliant for backpacking, provided it doesn't split.
I bought this mat in the summer and it worked well for 12 days camping in the Alps. The thermarest mat I used previously left me with sore and bruised hips after a few nights, but this kept me warm and comfortable the whole time. The construction really does prevent heavier bits of the body grounding. The rustling noise it makes when you turn over is a little irritating but didn't keep me awake. The pump supplied is extremely light and works very efficiently. Unfortunately, on the second night of a subsequent trip this September,a 2cm split while I was sleeping caused it to deflate instantly! I applied one of the patches supplied with the mat, following the instructions carefully, but it wouldn't hold once I put my weight on the mat. I returned the mat to Go Outdoors and the manufacturers authorised a full refund. It was so comfortable for the weight, that I'm buying another one and hope I don't get deflated again!