I also have some, bought from Pro-Lite and directly from GG, these are the "Torso Lites", I think they are called?
I use these, across the width of my "bed" as an underlay to my BAIAC or my Esped Dam9 and they are really worth having. I have found over many years of use of the finest bags one can buy that it is absolutely CRUCIAL to do two major things to enjoy a good "bed" in the bush.
One is to make certain that NO damp or drafts can get to your sleeping arrangement and this is where a good bivy can be worth it's weight in diamonds. The second is to have enough insulation/padding UNDER you and of a type that does NOT move around.
I have come to prefer heavier and warmer underlay and lighter bags for my use and the GG pads REALLY do work in this regard.
