The people at the Embassy were very nice. The immigrant line was very short and we completed the interview within fifteen minutes. Just handed in the required papers and answered a few questions. I'm the petitioner and I went with my fiance to his visa interview. He was asked how long we'd been together and what he wanted to do in the US. Simple questions. Overall it was a really good experience and when it was over we were so happy. Good luck and don't worry!