Brian V.wrote a review of Outdoor Research Helium II Jacket - Men's on January 2, 2020
Familiarity: I've used it several times
Fit: True to size
Update: OR reached out to me and stated the jacket is meant for emergency use. So keep that in mind if you are in all day rain or you are through hiking the AT (lots of rain) this shell isnt intended to be out in it for prolonged periods. And while I dont know what the delineation or limitations for the word emergency is; I would suggest that if the goal once it starts raining is to get somewhere sheltered asap, thats probably the intended use (short duration). If your use case has you going into the rain and staying there a more durable shell would be advised.
Original review: There are plenty of great and not so great reviews of this jacket which make me believe the QC on this product is not where it should be and getting a good one is a gamble.
I've had this jacket for less than a year. It has wet through 3 out of the 5 times Ive had it rain or drizzle and now wets through if its cloudy out. Its a good wind jacket and its light weight. I just could not and would not rely on it to keep anything dry. I think there are jackets that will not wet through like this for less and more.