Sizing - I'm 6'1", 175lbs. I figured I would be a L, but Engle advised M and he was right. The fit is slightly short, but you'd expect that with a bomber style jacket. Shoulders/arms/chest are perfect.
No surprise, this jacket is top notch like everything else I have from Atlantic Rancher. I paid a significant premium due to border brokerage and customs fees, but even with the premium price and that surprise on delivery I feel like I have something I can wear for the next 25 years which is a hard thing to find.
Comfortable, more weatherproof than I expected, durable, etc. Will be my go-to for just about everything in the shoulder seasons in Ontario Canada.