I have one in large and typically wear large in sitka. Its a nice jacket but my only complaints are the cuffs are tight fitting and the torso is a little baggy on me.
Much like everyone else, I love mine too. I wear an XL, the cuffs fit me perfectly, but like Mttrout stated- the torso is a bit baggy for me. For reference, I'm a 42R jacket, average shoulder/neck/arms, and come with a bit of a belly.