This shell is really waterproof and windproof and breathes like it's advertised. The two way zipper has a problem: The lower of the two zipper pulls gets hung up every single time I attempt to pull the lower zipper up, or down. The main zipper consistently works very well. I purchased a large size and the sleeves are about two inches too long but if a puffy down midlayer is worn beneath the shell, the sleeves "shrink" about an inch so sleeve length is no longer a problem, except when the shell is worn without an underlayer. The wire in the hood is useful and works very well when a midlayer with a hood is worn. The shell is indeed light and readily packable but a bit stiff primarily because the main zipper and the two long zippers on the chest are pretty inflexible. All in all, it's a great shell typifying the quality one's is used to expect from Mountain Hardware.
This review was written in the old system and had content requirements that are different than reviews written today.