Used mine for the first time on a 1 night trip in the San Gabriel's (LA)at 2,000 feet yesterday. Temps were forecast to be about 47 degrees, clear night, little wind. I was solo in a Fly Creek tent with a Phantom 15 bag and the Synmat UL7. I was very warm.
I have the 64 inch version and I'm 5'7" (67"). I should've put my bag under my feet. I also found the pad to be very slippery on the tent floor, but not slippery on the top. So I didn't slide off, but I did end up squished into the side of the tent due to a slight slope. If I end up keeping the pad, I'll put some seam sealer strips on it.
I did find it narrow tho. It felt narrower than my Prolite, tho both are advertised as 20 inches wide. It was annoyingly so. Maybe it is actually narrower than 20 inches once blown up, I haven't measured it exactly yet. Maybe it's a function of the vetical baffles that made it seem like that - not sure why.
I like the separate inflate and deflate valves. I didn't like blowing into the valve versus blowing nt Thermarest style sticking out valve, but it worked fine, and deflation is very easy indeed and makes the pad much easier and quicker to pack than a Prolite. Packs down smaller too, almost to the size of a hard Nalgene.
Doesn't inflate very very hard, and I was concerned that my hip or shoulder (side sleeper) might hit the ground, but once you're lying on it, versus kneeling or putting pressure just on one spot, it's fine.
So, good mat, warm, but not a fair test since it wasn't a cold night. Just not sure I'm a baffle person, and that would be the only reason I might revert to a Prolite.
Looking forward to others' opinions.