Susan Rogers wrote a review of Arc'teryx Cerium LT Hooded Down Jacket - Women's on August 30, 2014
Familiarity: I've used it once or twice and have initial impressions
Fit: True to size
I have a problem, a jacket problem. I tried this baby on and just had to buy it. Something about the fact that it fit like a glove - which coats rarely do - and weighs a stupid 8 or so oz in the XS. I haven't ever found a down sweater type jacket that I've loved as much as this one, even right off the bat. The Patagonia and Marmot offerings were never quite light weight enough for my liking or fit quite as perfectly.
Fit: Went with XS. I'm 5'3", 120lbs ish; I climb and don't have the world's smallest forearms and was really impressed at the fit(finally, enough space! No more sausage arms!).
It feels as expensive as it is. Which is probably a good thing. Has a great warmth to weight ratio, too.