My experience was like almost every other review on here.
I got to the consulate at 6am (since I couldn't sleep) and was first in line. The guard came out at 730am and I was in the elevator at 8am. I got C1 and waited 5 minutes until I went to window 1. I had everything in order so that only took 5 minutes. I then waited 10 minutes to go to window 7 where I took an oath and the CO verified my finger prints. She asked me three questions :
How did you meet your husband?
Where does your husband live?
What does your husband do for work?
She then grabbed a letter out of a drawer that said WELCOME TO THE UNITED STATES OF AMERICA!
I was out by 845am.
Side note - They did not ask me for copies of anything. The first lady said she had copies already. I was asked for my marriage certificate and birth certificate (which were given back), my passport, two passport photos, my police certificate and original I-864.