I've been through a few sleeping pads and ultimately settled on the There-a-Rest ProLite Long. I was skeptical about using a self-inflating pad because they are so thin and I didn't think I'd be comfortable. In the end, this is better than the air mattresses I have used. The best part is that it doesn't make noise when I turn at night so I don't wake up. I've used it down to the low 40's so far and I'm not cold at all. I also don't ground out (I weigh ~190lbs). I'm 6'3" and the long version is plenty long enough. It does take a few minutes to inflate, and I wish it was a little wider, but overall I am very happy with it.