My fiance had her interview at the Embassy in Manila. The day before, she met with the service we're using to help process all the documentation and verify we have everything needed. The interview went quite well. She was only asked a few questions and they only really looked at a small portion of the cooperating documentation she brought along. She had put a LOT of time into making sure we had everything anyone could want to prove the relationship was legitimate and that I had visited her and her family multiple times (photo book, scrap book, hotel/airline receipts, etc.). So I'm sure that helped when the consular officer saw she was prepared. So I guess there's not too much to say about it other than be prepared, carry yourself with confidence (NOT arrogance) and dress properly (not that I know that had anything to do with it, but I suspect it did).