It happen so fast.. They are very organized. I was with my husband and my son during their interview. We went there just right on time before they let people in.. They let me in as well even if i dont have an appt. good thing i did because i forgot to sign one of the papers so i was able to sign those before the interview with IO. Until our time, he first talk to my husband and son and ask their names and birth date. And the rest of the question was all for me i guess. Gosh. Im not even ready. Lol. He asked why it took me months to file the petition.. And so on. Diidnt even heard him say Congratulations that is why i am hesitant if we made it or not until we went to the window where u fill up a paper where you want them to send u the passport with visa. Wooohhh. We made it.. I think the whole process was just an hour and half.