This has been a great jacket for me thus far.
I'm 5'6", ~170lbs, and I went with a size Small and it's a great fit. Slim fit, but I can still easily layer underneath as and still have all the articulation I need. Covers my butt though it is not long or baggy by any means. The zipper comes all the way almost to my nose, offering face protection during storms.
Feels bombproof and offers great storm protection from pow, wind, and freezing rain, etc. I've gone through all sorts of conditions with it and it has held up every step of the way. Also, the pit zips are big and are very efficient at dumping heat.
It even packs down surprisingly small for its construction, though it is definitely not on par to a true alpine shell when it comes to packability and weight. It takes up considerable space in the bottom of a backpack compared to other lightweight shells, but I don't think that is really the intention with this jacket anyhow. That being said, I think Trew finds a decent balance between bombproof and light/packable if you did want to use this as a backcountry shell option, leaning towards the bombproof end of things.
Lastly, the jacket that I originally was sent wound up having a defective main zipper. It started off by not sealing properly, to eventually unzipping from the bottom. This was a bummer, but Katherine from Trew Gear provided stellar customer service, was super helpful, and got me a new jacket in no time.I will update if I have any issues with the zipper on the new jacket, but so far so good. As bonus points, my old jacket with the defective zipper is being fixed and will be sold at a discounted price in their store instead of going to landfill.
All in all, great jacket that I've grown to love. I had been using the Powfunk bibs for a year and loved them so much I thought I'd buy a jacket this year too. Rad company with good customer service and some bad ass product.