As a side sleeper and someone who's never slept well in a mummy bag, I'm sold on using a quilt for camping and backpacking. I need conduct some more testing in cold weather before writing my full review, but here are some pics, opinions and info for now:
I would be all over this if I didn't already have a Big Agnes bag. Similar principle where the bottom of the bag has no insulation (that's what your pad is for). And the pad being inserted in a slot in the bag makes it so you can roll over and move independently of the bag.