I have now got 8 days with this jacket, and I must say that if you see one on WM and are thinking about a new jacket, pull the trigger.
The OP is a great review, and I completely agree about the functionality of the hood/collar. A few windy days, warm days and days with sleet. The jacket was plenty waterproof, plenty warm, and the best part : anything that WAS wet at the end of the day, the jacket was bone dry by the time night riding opened up!
I too got the medium, but am a bit bigger than a few who posted about it before, I am 5'9 but 190lbs. Still fit great, lots of room to layer.
Only complaint is that with the media pocket on the outside, your device can get cold fast and kill the battery.