The biggest problem I find with any of the colder bags unless your spending alot of money is weight and packed size. I didnt have the budget when I bough my last backpacking bag. It's a Marmot Scandium -7 that weighs 2 lbs 14 oz and compresses into the size of a rugby ball. Nothing special about this bag. Just a 650 down synthetic combo but has kept me dry and warm in the -1 area. I would like something warmer and lighter and smaller but I know I'm gonna pay for it.