My wife had her interview this morning in the Tampa, FL field office. Total time there was about an hour, but she went in 30 minutes prior to her scheduled interview time. She said they went over a few tax forms, which were the ones we submitted during the application process, just to verify. She then answered the questions that were asked and had to read a sentence and write the answer. She is from Canada and English is her native language. They told her she had passed and that they scheduled her for the oath ceremony tomorrow, 10/31. Being last minute, we want the kids to go to the ceremony, so she asked if they could schedule it for the next available one, which they said they would do in about 2-3 weeks.
All in all, everything went mostly smoothly from when we first started this back in 2010 to get her Greencard. Good luck to everyone in their remaining journey!