Paul sent me one of these to try-out for him and I'd have to say I'm impressed with it. It is absolutely snug to the hammock; no fiddle factor. Also, you'll never misplace that color red...NEVER!
I've got three nights in it so far. The first night it was just under the 30° mark and I slept like a baby. Second night got down to 24° and again, slept right through it. The third night (last night) I decided to try something and removed the tarp from my setup completely. No real strong winds, but a pretty steady breeze. It didn't get real cold last night (back up around the 30° mark), but I did notice a big difference. I eventually wimped out and put the tarp back up. Was warm and snoring about 10 minutes later.
I don't know the specs on it, but it is very light. Compresses about as well as other high end synthetic insulation; about the size of a 2 liter. This is a quilt I would carry happily.
My best guess, having not found its bottom, is about 20°. I was warm at 24°, but when I got up in the middle of the night and climbed back in I could feel the quilt trying to warm back up. Wasn't the low-end, but I think it was getting close. A clothing boost would take this quilt into the teens for me, I think. For most folks, I think 30° is a fair rating. I think anybody could go to 40° with ease. It took the quilt all of about 30 seconds to warm right back up after I put the tarp back up last night. Probably took a full minute the night before when I got back into the hammock. Only 6 degree difference, so I'm pretty sure it's going to lose the tug of war lower than 20°; like any other 3-season quilt would. But above that, nice freakin quilt!
Not entirely sure you're getting it back either. Just sayin.