I was on this trip with drewboy and was testing my new insultex UQ as well. I would rate this quilt around 40 degrees. Had to get up around midnight to put my down uq on. The only other improvement that could be made would be to be able to attach the foot end so that it doesn't slip out from under my feet as I lay diagonally in my hammock. A little more shoulder girth would be nice, but I am a bigger guy. Thanks for the innovative product. It's going to be an awesome addition to my summer kit