Our experience at the embassy was smooth and painless. From the time of our appointment, the entire interview process only lasted about 30 minutes. First my wife and I were called to a window, where we presented the original documents and answered a few questions. This process took about 20 minutes. Then we were give back our originals and told to sit and wait to be called for the interview with the CO. My wife was called alone for the interview, which lasted only 4 minutes. She was told she was approved and that they would call her phone when her visa was ready for pickup. Both of the people we interacted with were very friendly and helpful in this process.