I have the short one, and I dont have any complaints out of it. I've read about people having problems with them being loud if you move around, but I haven't noticed any issue like that. I've only used it a few times, but so far I dont see any downsides. All my experience with air mattresses before my neoair had been with the cheap pool float type. As we all know, you can almost never get ALL the air out of those. The neoair is nothing like those, and deflates very easily.

I was going to point you in the direction of the the "sleeping cold in my WM ultralite" thread, but I see you've already posted there. I really dont have any experience in the colder weather with the pad, so I can't really say anything on that topic.