I've worked at Backcountry for years now and this is my first Arc'teryx shell. It lives up to all the hype I've absorbed over those years. I bought it for year-round usefrom snowboarding to backpacking. I decided on the Theta for a few main reasons. 1. Gore-Tex Pro Shell is totally waterproof, extremely breathable, and bombproofwithout being too heavy for backpacking(in my opinion) Paclite was an option I was tossing around, but I wanted something I could abuse a bit more. 2. The length of the jacket. I wanted the extra length for use in Wasatch powder(no powder skirt) and for extra coverage in violent afternoon thunderstorms. 3. I wanted a jacket that would last for around a decade, not just a few seasons. I know plenty of people who've been wearing the same Arc'teryx shell for that long.
I'm 5'11 185lbs and the large fits me perfectly. Sleeves aren't too long and the hood doesn't bother me. I wore it through last winter and it outperformed my expectations. Looking forward to some storms in the Uintas and not worried about staying dry.