I used the pad for the first time this weekend and although the temps weren't nearly low enough for a warmth test, the pad felt comfortable and warm. My only complaint was how long and hard it was to deflate the pad. While pumping it up was just as fast and easy as my Exped Downmat 7, deflating was another issue, in fact, I had to pack it up with some air still in the pad. I think there must have been something (down?) blocking the valve because when I got home, I had no trouble deflating the pad, but in the backcountry, I couldn't force the remaining air out of the pad even sitting on it.
The valves Bender uses are the same as the ones used by Thermarest so they have a long history of durability and performance, but perhaps they might not be the right choice for a down filled mat, or perhaps it was a freak indecent.
Overall I was pretty impressed, if I can keep from having the valve issue, this will be my winter pad of choice.