I am 5'10 135lbs and the medium was a little too bulky for me in the torso, but I kept it anyways because I have long arms and the sleeves would be too short otherwise.  I (like many others) found a rip on the inside sleeve about 3 inches long, but the jacket was such a good deal that I didn't mind hand sewing it myself.  And to be honest, I used it while up in San Francisco where it was windy and cold and it was surprisingly warm on at night with only a t-shirt underneath.  Love it...but could use a QA person to check those seams!