Officer called our name and took us to the room in the back. Oath ceremony at the beginning of the interview and were asked to have a seat. Very informal after she saw all of our documents. She was in love with the fact that we did our homework down to the T and filled all of the requirements on the I-797 interview invitation letter. After that just ran through the questions from our initial application and before we knew it, it was done and over. Very nice and easy process.