I live in Hawaii where the weather tends to be unstable between tropical cold/wet to sunny and hot. In my past two to three weeks with this shirt, I'm pretty happy with it's performance. It's really lightweight, waterproof, and the fit is okay for my use. One major issue I have with the shirt is the design. I think the zippers that run from the sleeve cuff to the whole forearm is unnecessary and a little annoying. The zipper occasionally comes loose too. I would get rid of the forearm zipper entirely or move it to the armpit area. Next design flaw would be at the bottom/hem of the shirt. I'm not sure if it's just the stitching, the fabric, or the elastic cord but there isn't enough give for me to get into the shirt as it doesn't stretch so much for you to put it on easily. I would increase the diameter of that area of the shirt. The other issue I can imagine is the fit. The fit is okay but I would put it on the smaller or slim end of the spectrum. If you generally like a loose fit i would go a size up but overall it isn't horribly small. Aside from all the negativity, I really like this shirt and it makes a really good and lightweight fashionable casual wear for a nice broad range of weather.