I'm a lot smaller than many other reviewers and even for me, it was a little too skinny.
I actually really liked this pad. It was affordable, lightweight and I used it just below freezing and it definitely kept me insulated from the cold. I got the regular size because even though the pad is wider, at 5'2" I really didn't want it that long and I really didn't trust myself to modify its length manually although that is an option that Klymit advocates (they offer instructions if you're interested). I tend towards side sleeping and curling up into fetal position and while this pad at least kept my hips above ground which is great for petite side sleepers, it left either my butt or my knees hanging off the pad which isn't....ideal for quilts or uninsulated back sleeping bags. I have the latter, but one of the complaints with the Sierra Designs Cloud sleeping bag is that the sleeping pad sleeve is a bit skinny. The pad fits! So that's wonderful.
TL;DR good sleeping pad, great insulation in reasonably cold temps, lightweight and compacts well, very skinny.
Would recommend to a friend.