The quilt lovers here and elsewhere sold me on the idea, it didn't work for me very well. I was cold in a zero degree wide EE Enigma in 30 degree temps because of drafts. Could I have practiced and learned to manage drafts better? Probably. It's just one of those things that I don't want to fiddle with though, I want to lay down and go to sleep and not worry about how my movements might create drafts that will suck the heat out of my sleep system. I haven't gone on backpack or mountain hunt yet where there wasn't a possibility of 30 degree or cooler temps, but if I did i might try them again. If using a floorless shelter with bivy I'd think a bivy would help with drafts a bunch too.
While on a scouting trip this spring and testing out a new custom Nunatak Apex mummy bag (20 degree rating, 35 ounces) my neoair pad started leaking and I woke up on the ground in 25 degree temps and with condensation on my bag from rubbing up on the single wall 'mid shelter. Apex insulates better when compressed than down and I wasn't even cold, just uncomfortable on the hard ground. I would gotten cold quick in a quilt and it would have had a lot of drafts trying to re-inflate the pad. I would bet I would have been colder in my 20 degree WM alpinlite too. The weight of the bag was worth it to me in that case. When you consider that folks might bring a heavier, warmer pad, need additional head insulation, or bring a bivy when they wouldn't have, the weight savings are erased. Some folks use their puffy to stay warm in a quilt, I'd rather save weight with a reduced rating bag and use a puffy. I also have never had issues being comfortable in a mummy bag but some people do and find quilts more comfortable.
Top brands I'd look at if considering a quilt - Nunatak, katabatic, feathered friends, Western Mountaineering. Honorable mention to enlightened equipment.
