This jacket should be mandatory for any outdoor athlete in the Pacific Northwest. I bought it primarily for running in the cold and rain during our long winter/spring months. I was worried that it wouldnt be breathable enough given that it is fully waterproof. So far I have been very pleased. Yes, you might get a little damp from sweat when pushing it up a hill, but compared to many other running jacket I have, this is much better.
I like how its waterproof, but doesnt stick to your arms after getting wet like other wind breaker type jackets that I have. It also has tapered sleeves which is nice for minimizing excess material. I sized it to fit with just a short sleeve wicking layer underneath since its primary function will be a running/biking jacket. I'm 5'10" 150lbs and got a medium. It fits perfectly for what I got it for. Feels a little snug with a long sleeve baselayer under, but I dont plan on ever needing a long sleeve underneath. I would have sized up if it was just a casual jacket. I also like the lack of bulky pockets. I dont need handwarming pockets when Im running or biking. I also like how this jacket doesnt come with the attached "gluff" (glove/cuff) like the non-hooded jacket has. I'd rather bring my own gloves if i need them and decrease the bulk at the end of the sleeve.
My only grips: sleeves are a little long, as with a lot of MHW product i try, maybe i have short arms. Second, I would have like either some velcro at the end of the sleeves or a more elastic cuff to keep the sleeve locked down. Minor annoyances with an otherwise flawless jacket. I also dont usually use a hood will running or biking, but its come in handy a few times so might as well keep it just in case.
Bottomline: This jacket enables me to train year round, stay out longer and keeps me happy. A worthy investment for anyone putting in work while in wet, windy, cold conditions.