Our interview was scheduled for 8:00 am. We arrived about 45 minutes early to a small line out front. We were escorted in and processed in. My wife stated that the staff was nice and professional. As some have stated, bring everything with you. Even information provided with your USCIS application. The woman who interviewed my wife asked several times how many times I visited Canada and do we have any proof. As we all know the information was provided at the USCIS stage. I was interviewed by and everything worked out ok. I know Packet 4 states what to bring. But, its truly not complete as the interviewer may ask for further information related to your application. All in all though, it was a smooth process. The interview stage was probably the easiest part of the process.