The jacket has a ton of great features (powder cuff, cinch waist among them), but I just couldn't get over that I looked like the Michelin Man in it. I wanted something to perform functionally and aesthetically. For my 5'11", 160lb frame, the aesthetics just weren't there. Oh, I tried a Medium, and I don't think a small would have worked.
BTW, for reference, the Mountaineer looks good and is a great jacket (though lacking several of the Skreslet features), but the inside wrist cuffs were too tight (hot) for my taste.
This review was written in the old system and had content requirements that are different than reviews written today.