I've been using the jacket this season and have been really happy with it. Patagonia jackets have weird fits, in that they seem non-uniform among models. This one fits me great (medium, I'm 5'11", 160).
As far as function, it's a pretty warm jacket, but breathes nicely. I use it for ski touring and winter climbing. For touring, I skin in a capilene top and an R1. At the transition, I throw on the jacket to keep warm and for the ski down. For climbing, if I'm working hard it is usually too warm to wear. Though if it's cold, I can "work" in it no problem. Climbed NE Butt of Chair last month (during cold snap) wearing capilene and R1 top, then this on top. Wore it the whole climb and even put a down jacket on top at belays. It was pretty darn cold out . . .
My only complaint is that you basically have 2 layers in one coat which limits you on layering options. However, if it's cold enough, this doesn't matter. I'm pretty skinny, so the extra layer helps, but it would definitely be too hot to, for example, to skin in or make a brisk approach in.
Hope this helps!