Arcteryx is such solid gear, you absolutley get what you pay for. If this jacket is in your price range pull the trigger. This jacket is best worn under a shell in our cold Northern Michigan winters, it breathes while locking in great warmth. I always wear this jacket with a wool snug base layer like an Icebreaker 260 or smartwool. If the wind isn't riping you can wear this jacket in the teens with a quality snug baselayer and still stay comfortable.
If your looking for the best all around jacket the Arcteryx Beta AR is the real ticket. This jacket is a great compliment underneath but without a solid shell this jacket does have it's limitations.
I am a pretty big guy six foot four inches 220 pounds, I wear an XL. The fit is perfect I can still wear a snug base layer under, so I can wear the jacket in colder temps. Hope this helps