What Size to Get?
I'm 5'6", do I get the regular or the small to save weight? Is it uncomfortable to have your feet dangling off a pad?

I am 5'5" and got the small. My feet dangle off the end... while it doesn't bother me as much as other folks, I will take another approach to what other folks answered and say that 5 ounces is significant. I will admit I am an ultralight backpacker, but if you start shrugging off 5 ounces here and 7 ounces there, you'll wind up with much more weight than you thought. It's just a matter of weight vs. backcountry comfort. Because I don't mind my feet dangling off the edge, I opted to get the small as the discomfort of carrying 5 more ounces is more than the discomfort of my feet hanging off the end. I know it sounds kind of nit-picky, but that's the way I measure all my gear. Hope that makes sense!

I'm 6'2" and I have a small thermarest (different model, but the same length and width) and I can live with my feet hanging off the end (never get cold, but then I haven't really gone below maybe 40 degrees). A problem I have run into though that does bug me but may not be any concern to you since I am taller, is my knees don't fit on the pad, which I find quite uncomforable, especially since I am usually a side or stomach sleeper. I'd probably go for the medium if I were you and just bring one less pair of underwear if you are concerned about weight... you're going to smell bad anyway!

I tried a new Prolite small and it was ok. I actually gave it a good review. However, the temps dropped well below freezing one night (around 15 degrees) unexpectedly and my body nearly frooze! I am not a cold sleeper, but it was downright cold that night. I thought the small would get me thru, but it wasn't gettin it. It would make a good spring/summer pad. I also am 5'6" and after seeing the reviews on this, pad and the regular size being just perfect, I sent the Prolite back and am waiting to see the regular size show back up. I'm sure it will make all the difference in the world at just a few ounces more than that Prolite and Im definitely willing to pack those few extra ounces for warmth, mainly, but comfort also.

One other option would be to get the medium (which is 66 inches). But this pad is so light that there is only a 5 ounce difference between the small and the regular, so unless you are a hardcore ultralighter I would definitely go for the regular (or at least the medium). Sure, you can get used to not having a pad under your legs, but why do so if you don't have to? Besides the killer comfort of this pad, the really nice thing is that it is so light and packs so small that such sacrifices are not necessary.