Just got in the house after feeling the urge for a backyard hang last night. Temp got down to 21 degrees and I felt pretty good all night. Heres how I prepared for it: KAQ new river 30, REI radiant 20 down bag for TQ, 1 pair wool socks, fleece sweat pants, tshirt, underarmour synthetic medium pullover, Eddie Bauer down/fur hat, hot water bottle, and no sleeping pad. This was the bare minimum for the conditions and I just wanted to gain the confidence in my backyard and not out I the woods 10 miles from my car. Woke up for the call of nature at 3, felt a little cold on the feet and converted my down puffy from a pillow to a foot warmer.
I'm very confident in the abilities of this quilt for low temps. Normally I'd be in long underwear top/bottom, fleece top/bottom, double socks, plus extra clothes stuffed around my feet. I'd also be using a thermarest pad for extra insulation. For my normal michigan 3 season use and the occassional winter trip, this quilt is perfect. I also added niteeyze figure 9 to help cinch it up to my ridge line as suggested in the forums.