I arrived 30 minutes early (a little paranoid). Straight through security and up the elevator. There were approximately 10 people in the waiting room. As soon as I arrived I was called up to the first counter to submit some documents. Five mixture later I was called up to the second window. After answering a few questions (fiance's name, address, job, wedding plans etc) my visa was approved. All done 15 minutes BEFORE my scheduling appointment time. Very impressed with their efficiency!