Rating: 5 / 5
See thread with pictures and comments here: http://www.backpackinglight.com/cgi-bin/backpackinglight/forums/thread_display.html?forum_thread_id=48962
I've used this quilt for about 20 nights now and continue to be impressed. Total weight in the 6' normal width model is 21.6 oz.
I have had it down to 21F. Sleeping in a bivy on a NeoAir and a 1/8" thinlight with a Montbell UL Parka and warm base layers on, I was comfortable at that temperature. I would say the temperature rating is right on target.
The normal sizing is very generous. I am 5'10 175 lbs and I have plenty of room to sleep on my side and the quilt is long enough that I can pull it up over my face if I need to.
The pad attachment system works wonderfully - it feels more like you are in a sleeping bag than a quilt. Drafts have been a total non-issue and once I clip the pad in, I don't have to touch it again until I am packing up in the morning.
I have very few pieces of gear that I can't think of a way to improve - this is one of them. 5 stars.
UPDATE: I have about 100 nights in the Alsek now. It is as lofty as when it was new, and continues to be what is probably the nicest piece of gear I own, both in construction quality and overall design. The plastic pad attachment clips are slowly losing their friction and might have to be replaced someday, maybe in another 50-100 nights. Other than that it looks brand new. I have no need for any other sleeping bags and have sold everything but the Alsek.