So I've been wearing this jacket for a couple of weeks now and I'm blown away by how warm it keeps me. I wear this biking 2 miles to work everyday (I know, not the intended purpose of this jacket but it works for me) the first time I wore it I layered up under and over this jacket, which was my plan when I first bought it, but oh boy was that a mistake. I quickly overheated and learned that all I need is a light sweatshirt underneath and to cinch down the bottom to keep the draft out (the power of 800 fill down is amazing). I've stayed warm with the windchill dipping to -20 here in Minneapolis (it is quite wind proof as well, which is great). It's not only wonderfully warm but also stylish too, the retro color and design are a nice touch making it nice to wear out and about town. WORD OF WARNING: this jacket fits very large, I'm 6'2" and 180 lbs and normally wear a size large but this jacket fits perfectly as a size medium.