Family Based Greencard

I went through applying for my husband's green card and it was a very long and stressful process. The USCIS is absolutely terrible at providing updates and they are incredibly slow. Plus, the process is so archaic, all through paper and mail, and such long stretches between things because they don't want it to be easy. We applied for an adjustment of status (I-131), so that my husband would have authorization to work & travel out of the country before the full green card, but even that took a full 4 months (of which he had to be idle and could not leave). Entire thing was close to a year. It can, of course, vary by case and by region, but here were my milestones (we live in NYC):

7/27/16: application sent via FedEx
there was a bit of back and forth because they sent us confirmation notices and some of them had incorrect info - address and birth date were both wrong (their mistake since the application had the right info) and the correction process was tedious and annoying. still, i don't think it delayed anything.
8/26/16: went to NJ for biometrics appointment
10/21/16: I-131 was approved
11/3/16: received EAD card & travel authorization
4/28/17: received notice that interview was scheduled for 6/1
6/1/17: interview held in NYC
6/16/17: received approval notice and green card mailed
6/30/17: green card received in the mail!

Hope this is helpful. I know I searched endlessly to read other people's timelines, just to have reassurance that my case wasn't off track. It's not a fun process at all, but good luck to everyone!