I rarely do reviews, ...
... but this jacket's been very nice so here we are.
Normally I'm a size small as a 5'9" guy with a 36" chest, but the medium fits great. A bit slim, so I can't layer too much bulk underneath, but I guess that's this jacket's style. The sleeves are a bit long, but I don't mind.
Otherwise, everything else is great! The jacket seems well constructed, the water-resistant ventile outer did its job when I was in rain for short periods of time, and I stayed warm and comfortable without overheating in a range of mild winter temperatures. Loads of useful pockets inside and out. Smooth zippers. Silky smooth inner lining, though I find myself being extra careful when using the handwarmer pockets because the lining feels thin, but maybe I'm underestimating silk's durability.
Thumbs up for customer support as well. Initially I somehow accidentally ordered the XS instead of the M. Customer support quickly responded to my query and got that sorted out.
And another thumbs up for emphasis on natural fabrics, sustainability, and longevity.