I thought it would be a long wait. I went two years ago and waited a few minutes outside then a couple hours inside before being helped. Today I had to go again to update my status from resident to citizen. I got there at 8:30am (Friday) and waited outside in a long line. At 8:55 they started letting people in. I finally got inside just after 9am. I just sat down when a lady directed me to an open window. I was in and out in less than 10 minutes. For the wait outside, bring a folding chair and something cold to drink, the rest is easy and quick!! From the security guard outside, to the guard inside checking bags, the lady directing people and the lady helping me - they were all very friendly and helpful.