I really like this vest thus far, the real test will be this winter. I have the old blue color, kind of girly, but hey, I will be warm! I wish they would make the waist a bit slimmer in the large or the shoulders a bit wider in the medium, but regardless, it works. I am about 5'7" and 170 pounds and as previously stated, the medium is a bit too constrictive in the chest, so I opt for a large in most Patagonia jacket and whatnot. This is an outstanding layering piece, especially under a shell to do a bit of skiing or whatever active outdoor activity you prefer when you get a little chilly. Cheers!