For me, the best sleeping bag is sleeping on my mattress at home. I am side sleeper and nothing has ever been comfortable. Add to that, I am claustrophobic. If anything gets the least bit twisted or constricting, I go absolutely ape! I usually run out of the tent in a cold sweat, partake of a good Modified Stationary Panic (thanks Patick F. McManus), and then sit by the fire until I calm down - 20-30 minutes. So, I have to sleep, how shall I say it, fairly close to birth conditions - only socks and underdrawers. In the end, I don't do the sleeping outside thing anymore.