Thanks a bunch for the nice comments
I am gonna be rather doubtful that I'd get down to 20deg and be warm in these quilts. I tend to get cold easily.
I guess once the GA weather cooperates again, I'll be out in the yard giving it a try. I'll use gear and clothing that I'd normally bring on the trail to get as real of an experience as I can. There's really nothing to cut the wind in our yard, so it should be a good test, pushing a bit beyond....
I'll update when I get to try them out.