I was really stressed out and worried about the interview. Was in and out in 30 minutes. Very good organization, very nice staff.
I was only asked 3 questions:
-When did you meet/start dating your fiance ?
-Is he studying or working?
-Are you planning on living at this address in NC?
And "everything looks good to me, your visa is approved! You'll receive it in 5 to 10 days".