Tony Wwrote a review of Outdoor Research Helium II Jacket - Men's on May 25, 2014
Familiarity: I've used it several times
Fit: Runs small
Best thing about this jacket: It really breathes. I use it for my bike commute to work and it's a great top layer for when it's windy or drizzly. I live in So Cal and I don't know about this thing you call "rain", but I dig this jacket. It packs small and lives in the bottom of my pack until I need it.
As has been noted, it runs a bit small in comparison to OR's other stuff.