I arrived at the DO exactly 30 minutes before the appointment. I work nearby so that part was easy.
I went through security and upstairs to the second floor where I left my appointment letter with the receptionist ( a very nice lady who chatted with me about London and Edinburgh. Then I went to sit and wait.
I waited till almost 20 minutes after my appointment time. Then a female IO came out and called my name. As soon as she saw me stand up, she started to walk away... it was a little strange... she didn't say follow me, or come this way, or anything... she just said my name and started walking when I got up. I had to move pretty fast to catch up with her.
We walked into her office and she told me to raise my right and hand and swear to tell the truth, etc.
Then we sat down and after a few moments of pleasantries, we were off. She was ALL BUSINESS. We went through EVERY LINE of the application and she asked for almost everything on the Johnny Cash list... only thing she didn't ask for was my tax documentation.
I applied based on 5 year rule. I am married to a USC but I have had a GC since 1992. I was previously married and so was my current spouse. IO asked for divorce decrees for my spouse and I... she asked for our child's birth certificate... she asked for our marriage license... she asked for DMV disposition... she asked for W2... she asked for DMV paperwork on 1 traffic citation from 3 years ago... she asked for EVERYTHING... She was pleasant enough, but for some reason, I did not feel like she was particularly friendly... just ALL BUSINESS and very fast. At one point she asked me for a document that I had already given her and she repeatedly insisted that I hadn't given it to her while I insisted that I had, finally I pointed it out in her rapidly growing pile of documentation... she didn't apologize or anything... just kept moving... it was bit of a frustrating experience and I got more and more nerve-wracked as it went on.
Finally, when we got to the questions, she asked me the questions very fast. I almost didn't notice that she was asking the first question, and my mind went blank for a second... even though it was really simple... "What is the name of the National Anthem?" For some reason I couldn't remember for a few seconds... finally it clicked and I knew the answer.
Questions were...
What is the name of the National Anthem?
What does it mean that we are a "nation of laws?"
Why does the flag have 13 stripes?
What ocean borders the western United States?
What happened on september 11?
What age can you vote?
I got them all right and she immediately switched to a different sheet of paper which she handed to me saying "Read any one of these sentences." I read "How many US Senators do we have?" and then she handed me another sheet of paper and told me to write "We have one hundred senators" and sign the paper.
FINALLY, she looked up and smiled... "congratulations, you passed the tests... I will be sending you a decision via mail" It was all very fast.
I tried in vain to get some idea of when oath date might be (I am trying to get early January because I MUST travel to the UK and France in late January and it will be much easier to do on a US passport than on my original nationality passport)... but she said, oath date is determined automatically based on application and interview dates and she cannot control the process.
Then she told me to wait outside while she copied one of my original documents which I had forgotten to photocopy. When she came back I asked when I could expect an answer and she said that she would "approve the application today but cannot predict how long to get oath letter."
That was it. Overall... it was an easy interview, but very fast and very frustrating... I am glad that thanks to this forum I was very prepared with documents.