This is a really nice coat! I'm 5'6" and 125lbs and the S fits very well. It's a perfect combination of fashion and function. It's attractive and slimming but still very warm. I live in NE Ohio; this coat is good for days when the temps are in the teens - 40s. The best part is the wind and water protection. I also own the Patagonia Tres 3 Parka, but after 6 years, it was starting to look too worn to wear to work. Because I never used the 3 in 1 function (wearing the down or rain jacket layer separately) I thought that the duet was a better deal (costs less, collar looks better, and it's lighter weight). I'm not sure if it is as warm as the Tres 3, but it's warm enough for me!
This review was written in the old system and had content requirements that are different than reviews written today.