There are a lot of things that make this bag great. I thought it was the perfect size for a day pack, it's light, and I found it very easy to rent a cartridge after a plane flight (was in Chamonix). However, I think the design of the air bladder release is poor and ultimately makes the pack useless for those who plan to hike with their skis tied to the back.
If you use the ski straps to hold your skis, the zipper along the top of the pack that keeps the compartment that holds the air bladder closed will release and your air bladder will spill out. Also, your skis will drop (imagine the top of the bag peeling open). You can get around this problem by tying your skis to the handle on the top of the bag. However, if you are in a slide while hiking and you?ve made this tie, the bladder will not function properly.
Also, on the second day I used the bag, the chest strap broke off. Also an easy fix if you?ve got some extra straps or line in your pack, but annoying for an item that costs around $500. I read another reviewer who had the same problem.
I?d suggest looking at a different bag.