Just got my BMBH last week, and I want to say it's really super comfortable. Great extra fast delivery. First I tried it without a pad in the sleeve and a down uq I made out of an old REI rectangular long sized down bag. It was great and kept me warm down to 40 degrees F. I am sure it will work way lower with the 2 1/2 lbs of duck down. On a side note, I bought two of these bags way back in the early '70s, and they are still great sleeping bags and have held up well under a lot of abuse. They're duck down, not goose down, which I believe equates to the lower fill power goose down. Anyway, they measure 52" by 79" for the Long, not sure about the length on the regular size one I have. All I had to do to mod it is add a grosgrain channel to the bottom of the bag for a shock cord and replace the drawstring at the top with shock cord and sewed four grosgrain loops at the corners. It works great. I like to add a windshield reflector screen in the pad pocket to get me an inch more shoulder room. Maybe in the summer forget the uq and just use the reflector and poncho liner top quilt. This rig is great for tossing in my fishing boat and island camping!