I really like the size of this jacket. It's not too short for really cold weather and it's not too long that it becomes and inconvenience.
The zipper under the arm goes all the way from mid tricep to halfway to your waist giving a huge ventilation effect. makes it more versatile but not quite as cool as a vest.
All in all, this jacket is a great staple winter coat if you live somewhere that the weather will often fall below 50 degrees Fahrenheit (as the high) and you want something waterproof.
It looks cool also. I got it in black and it has a handsome look. Not too sporty, and definitely not too dressed up so you can wear it over your nice clothes going out on the weekend as well as up to the mountain and you wouldn't feel like it clashed with your look.
I can't say I've tested it in arctic conditions but you could be bare-chested under this jacket and still make a run to the store in 30 degree weather and be comfortable.