You place your order and get a buzzer. Then you pay. Service is pretty quick even when it looks packed.
I usually order The Original which is roast beef, cheddar cheese and horseradish sauce. I'm actually not a fan of horseradish, but I really don't mind it being in this sandwich.
It's open 24/7 so it is an alternative to Lee's or pho after a fantastic drunken night of debauchery!