Fantastic!
"For years I had the smallest version since it took up the least amount of space in a pack or suitcase, but I found it relatively uncomfortable since from the knees down I was on cold, hard ground (I'm 5'1). I finally got around to buying the regular size and WOW does that make all the difference in the world. I sleep so well when I'm camping with this sleeping pad. My only complaint is now this one is like a foot too long! I wish there was a size in between small and regular, maybe a 65 inch or something."