In reply to UKC/UKH Gear:
I have the older Deuter Guide 35+. It's a brilliantly functional sac, and big enough to use on multi day expeditions ( I've just used it for a Haardanger Plateau crossing with a tent, stove etc).
The side zip is a key selling point for me - I can access my flask without getting out the things I really to be at the top (like the drysac full of spare gloves, or the tent inner which necessarily gets packed last!)
Steve