Keith M.wrote a review of Exped DownMat Sleeping Pad on February 26, 2012
This mattress is by far and away the best sleep I've ever had in the backcountry. It's very thick and plush so any position is comfortable to sleep in (I'm a side sleeper) without bottoming out. It's pretty bulky, but well worth the weight. It also fits nice and easily into it's own bag. It's probably 1.75-2x the size of my summer mattress.
I use this for backcountry sleeping and have had it for ~4 months and 25 nights and counting. With my -20 sleeping bag, I actually managed to be comfortable at -20 sleeping on the snow no tent all night. I have a summer mattress I will be using for summer trips to save weight and reduce wear and tear on this one.
The integrated pump is a really good design. I beat anyone with a blow up mattress 10 times out of 10. I would estimate 2 minutes. It also has nice hooks to hook a pillow into, which I plan to try out.
It's one of my favorite pieces of gear and I can't recommend it enough.