They are very friendly. The interview is all done standing and lasts 5-10 minutes.
Are basic questions:
What do you like about your fiance?
What the work of your boyfriend and what your job?
You ever been to America?
Whole process of document review and interview lasted 3 -4 hours.
But it is very quiet, with no pressure.
I was talking about living with other people who were waiting for the interview.