Interview process was very quick, though when you are on edge the slightest bit of thinking you have to do can go wrong... so I sat in the back to start with and was moved to the front, and when it was all over I went back into the room instead of out the exit durrr... When all is said and done if you have prepared correctly and got all your paperwork you should be fine.
There was one guy there who clearly didnt have all his paperwork with him.. suspect I know the outcome of that... and the guy in front of me was utterly disorganised, wading his way through mountains of paper trying to find the exact one he needed each time he was asked.
Note the interview techniques used... when I went up for mine he started to hand me back the papers one by one so I had to pick them up and answer his questions at the same time. Also querying the answer to where you met seems to be a common thread.. a ruse designed to put you off I think.. but again if you are genuine and know the answers it comes easily.
Looking forward to entering USA on 5th August ... will update further as we go!