I just received my jacket today and I absolutely love it! I live in Northern Canada, so it gets pretty cold up here and the jacket kept me nice and warm while I was shovelling outside in -20C. I think it would still keep me warm in -30C. The medium fit perfectly and I usually wear a size 12, and clothes anywhere from medium to large. The arms are a little short, but I have short arms so it's perfect. I'm not sure how it would fit someone with longer arms. It's very lightweight, but hardy, and the black color is perfect! Hope this helps some of you who are thinking about ordering. I know reading the reviews helped me before I purchased.
I receivied my Lily Green Goose down jacket last week and have to say that when it is -17 outside I was very glad to have it. I just love it, I read some other reviews before purchasing and read some comments about the arms being short which is a bonus for me as I have short arms so it is perfect. I also ordered the down gloves as well.
I got this as a Christmas gift the first year we lived in Fairbanks, AK. The temp gets down to -50 and its not my upper body that gets cold. The jacket has survived over three winters so far, still looks great and keeps me very warm.