I am sleeping on a department store closed cell pad, close to 3/4 length, on top of which I put a x-small prolite for comfort, with the prolite inside the bivy.
Camping spots have been exposed to 5 to 10 mph winds through the night, with the bivy as my main wind protection. There has been some condensation at the foot of the bivy, and even under the upper end of the bivy on the last night. I wondered if the down had become damp enough that night to lose some loft, because the down seemed more difficult to fluff than on previous nights. I did not have the drawstring at the top of the quilt adjusted properly until the end of the last night. And my head felt cold- I will bring a hat to add to the balaclava on the next trip. So the quilt hasn't been given an absolutely fair test. But..
I go to sleep feeling perfectly comfortable, with a nice squishy layer of down above me, but a few hours later I wake up *really* feeling the cold through the top of the quilt in the upper torso/shoulder area and around my hip, and where the head slit in the quilt resides. Pushing my hand down on top of the cold spots, I can't feel any down, just two layers of nylon, and I can't really get the down as perfectly re-situated from inside the bivy as I can when I am setting up camp, and the cold spots return more quickly.
The picture of the quilt with the light shining through the top is quite familiar- I create spots that let the light shine through every time I move the quilt.
I'm not exactly shivering, but loosing sleep and afraid to take it down into the 30s.