Abriah W.wrote a review of Patagonia Nano Puff Bivy Insulated Pullover - Women's on February 28, 2017
Familiarity: I've used it once or twice and have initial impressions
Fit: Runs large
The thing that first drew me to this jacket was the half zip pull-over style with a kangaroo pocket and a zippered pouch pocket. I've been looking for a jacket with that combination of features for a while and was so stoked to see this. I have athletic build with broad shoulders and usually wear a S/M in tops. After reading other reviews I was unsure of what size to get but went with a small and it fits like it was made for me! It's perfect with just a long sleeve or less underneath, anything more and it would likely be too tight. As it is, it does not feel constricting at all and I would definitely feel comfortable climbing in this jacket. I do think that if I had gotten a medium it would have looked too baggy.
As other reviewers have mentioned, the hood is kinda funny looking when it's up. Funny enough that I probably won't end up using it all that often, but on such a great jacket that's not a problem.