My biggest complaint - it just won't wear out! I have been wearing my R2 for over ten years now and I want a new jacket - but I need a reason. And the R2 is still going strong! I live in Colorado and wear my jacket probably 10 months out of the year...as casual or a layer! Everything from hikes and snow tubing to shoveling the driveway. It is amazingly lightweight, wicks incredibly well, and compresses for trips - and I have never had a problem with zippers not working or seams ripping.