This is a fantastic jacket, super waterproof and windproof. Its not only functional but stylish as well. I use this jacket for skiing, winter hiking, and backpacking. It's pretty lightweight for such a feature heavy jacket as well.
The stowaway hood is nice, at first I thought the hood in its stowed position might be annoying against my neck, as you can feel it at first. But once it was stowed and I went on with my activities I never even noticed it.
My only small concern is the zipper flap on the inside of the jacket at the top. Its rather large, and while it has a soft fleece feel it is also very stiff. This can sometimes poke out and hit your chin, but its only sometimes and pretty minor. Not a big enough deal to where I would not buy the jacket again, but it is something maybe arc'teryx can revist on the next generation of this jacket. Having the zipper go to the side is super cool though.