My interview experience was very rewarding and exciting. The pre-screener of Window 25 only asked me the pertinent documents (BC, NBI, CENOMAR, Notarized Affidavit of Support, 2007 Income Tax & W2, Letter from Employer). During my final interview which is in Window/Room 30, the Consul was very nice and never gave me a hard time. She didn't ask to show me any proof of relationship. She said a lot of positive things but the one that remains in my memory are the words "YOUR VISA IS APPROVED!!!"