Interesting topic as I owned a quilt for 3 years before I actually used it. I was always worried that it wouldn't keep me warm enough. However, one day I bit the bullet and packed it for a 2 night hike and I've never looked back. I've used mine in temps from anywhere between about 25 to the 60's.

A lot of people have mentioned cold drafts when moving during the night. I don't remember this being an issue but I'm gonna try to notice next time. Either it doesn't bother me or I haven't had this issue. I'm guessing that maybe it's just one of the things I've learned to live with.