I went to my interview full of the normal nerves and jitters. The consulate staff were fantastic, putting me at ease right away. The interview was a lot easier then I thought, a total of 45 min from entry to exit time. It took about a week to receive the package and I am now in the US getting used to my new life.
Just a note; I had heard that airport immigration would need to see my chest x-ray on arrival in the US. This was not so. You would be best to double check before lugging it in your hand luggage