This bag is absolutely MASSIVE!
I couldn't believe the loft of this bag after I pulled it out of the storage sack and fluffed it a bit. When I first got it out, it didn't look too impressive. After a couple minutes though, the thing had ballooned too a massive cocoon. I like how Marmot put the majority of the loft on the top of the bag, where it can keep you insulated. The down doesn't really do you any good on the bottom of the bag, since it is just smashed under your body anyway. The hood is a little smaller than I would have liked, but it's not a huge deal. I especially like the waterproof/breathable shell material of the bag. I can't imagine ever being cold in a bag like this. Top notch bag, but you definitely pay for it.