Can't go wrong
This is a good bag, in my opinion. It packs small enough - you can stuff it sideways in the bottom of your pack - and it's warm. Obviously, you need to respect the temperature boundaries that it says it will keep you warm down to, but I give it 5 stars because it does exactly what it says it does. On the plus side, last time out I was surprised to see frost on the plants around my tent, and I can't say I was uncomfortable at any time during the night.I also really like the mummy shape and the cinch for around the face. And the "Quantum expander zips open to add eight-inches of girth" to the bag, not firth, like it says.