In my experience I didn't need an appointment. He was able to get me in as a walk in. I did call first to notify him of the reason for my need for his expertise. However if you have something to do other than going there you may want to call, because he does take walk-ins. So if you take that chance to just show up you might be in a line, depending on a first come, first serve basis. So just to get a heads up. If you are on a press for time, call to be sure if he can schedule a specific time for you, at your convenience. Big John is a nice guy with excellent customer service skills. I recommend his expertise.
It's first come first served. I got there at 8am when he opened and already a line. Worth the wait!! Steven
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