This was a very surprisingly well fitting jacket when I first put it on. In the past, like as recently as December 2011, I had simply written off Patagonia as a company that doesn't make clothes I can fit in. This shell changed that.
I am 6'3" about 190lbs and my sleeve length is 36. I basically can't find shirts that fit properly without going custom. (which I never do) And to my point, any jacket from Patagonia I ever tried on was boxy, short and the arms didn't fit by at least an inch.
This Jacket is the opposite of this. The sleeves on the large are almost too long, which is definitely a good thing as that's never happened to me before. The body fit is generous enough for layering over a down sweater, but not so big that its ill fitting.
It seems Patagonia has changed their sizes for the better and I am very happy about that.
4 stars until I have a chance to use it for it's intended purpose.