My timeline:
Eb3, priority date June 2002
RFE on 485 for self March 2005, spouse a couple of weeks later.
Replied to RFE beginning of May. Received notice on June 8 that our case was transferred to Cincinnati, Ohio
Made infopass appointment to visit Columbus and was told that Cincinnati was the office that received files from the service center and that Cincinnati would forward the files to Columbus.
I had my Interview today and it went great.
I arrived there at 8.15 AM and my appointment wasn't until 8.40 AM so while I was waiting one of the security officers there tried to calm some of our nerves .....
At exactly 8.40 AM my Name was called, I walked into a area where she stopped me real quick, greeted me and ask me for any kind of ID so it is really me.