I walked-in to do my biometrics yesterday morning. The staff does not care about your appoinment date, they only check that the name on the appt letter matches you ID. I was out in 40 minutes. Staff was extremly friendly and cheerful. The guy who did my fingerprints was Asian and he said:" Soon you are going to get a working permit and americans are going to be whining that you are taking their job away. We don't take their jobs away , they are just lazy and like to whine." so true, he made my day.