Too bulky even in stuff sack. Just sent it back to where I bought it (Snow Leopard has been great so far) and will see if I can afford a down expedition bag. While I have no doubt this bag would have been warm it is huge! No way I would want to carry that bulk up a mountain.

I've tried this bag, in very hostile conditions, and i'd like to say that it worked like a gem, actually better than a gem. Temperature went below 20 centigrade, and while everyone else in the tent was freezing, i was warm, cozy and fresh for the next mourning.