I noticed it flows out a bit in the back, but it doesn't bother me too much. Figure I'd wear a bag over it.
I did get try it out in heavy downpour today (South Texas thunderstorms). It held up extremely well despite what I've read here on WS material. Maybe because it's still brand new. I was outside for a good 20 - 30 minutes, I thought moisture was seeping through around the shoulders & hood but it was just the coolness of the rain. Took the jacket off & was surprised to be as dry as I was. Only thing wet was the lower part of my pants where the J61 didn't cover. Wet season is just starting here, will update how long it can perform this well.