After using this bag extensively this season, in Utah and Montana, I can definitely say its one of my favorite pieces of gear. I initially bought the larger 32L bag, but due to the fit, I had to return it. Many people told me that 22L is not big enough for a ski touring pack, but I think it is the perfect size.
On a normal day, I will carry an extra pair of gloves, snacks, a beanie/balaclava, gopro and accessories, ski straps, small first aid kit and knife, and perhaps an extra layer, depending on the weather. This list is of course, on top of the shovel and probe that I always carry. My Black Diamond Deploy 3 shovel fits well in this pack, along with my probe that folds down to 1 ft. 4 in.
Some features I love about this bag are the hip belt pouch (its great for snacks or light gloves) and the helmet holder that clips on the pack. ALTHOUGH, you can't carry your skis and use the helmet carrier at the same time, which is definitely not cool and something that the larger 32L bag does not have to deal with, as the design is different.
As for the actual airbag component of this pack, I havent had to use it yet, and have only deployed the bag once as a test. Everything worked great and setting up/taking apart the system is easy and intuitive.
Overall, for day trips in the backcountry, I think this bag is an essential piece of gear!