I have had one for a while. It is the sort of jacket you can wear and still do stuff. I've got some pretty high tech rain shells, and still can't move around in them much without sweating. The Windcheater is durable and quiet, but very breathable. The pit zips make a huge difference in comfort while moving. They are definitely not waterproof, nor meant to be, but they will bead up if you just hit some sprinkles. For it to fit into backpacking, you have to look it as a shirt/jacket or else you end up with too much weight and redundant layers. I wear it over a base layer only and can move around in mild to cold weather comfortably. When stopping for any length of time, I add a puffy. Quality is excellent. It's a jacket you wear rather than carry in your pack.
