The first thing that you notice is the lovely material: although unlined, there is nothing flimsy about this jacket. Then, when you try it on, you realize that the cut is fantastic: the collar and the drape are particularly good. This is one of those garments that look much better on than they look by themselves (always a sign of quality). The colour, too, is even nicer than in the website's images.
I hesitated between an M and an L, and finally went for an M. I believe it is the right size for me in width and length, although perhaps the sleeves on the L would have worked better for me lengthwise.
I expect that this will look better and better with age, and cannot wait to see how it patinates. It really is head and shoulders above other jackets of this kind.