Been coming to Perfect for many years. I can always count on them to be open when I'm visiting my in-laws in Scarborough and provide the late night Dim Sum. Being from Mississauga, this is a cut above the Tremendous restaurant on Wolfdale Road because of the Dim Sum.
We went on Monday night as it was my Sister-In-Law's 29th birthday. I cannot go wrong with my usual order of BBQ Pork Bun and Pork Spring Roll. Hey, it's not the greatest in the world but for the price and in the late hours, totally sold! I usually get a plate of E-Fu Noodles to go with it.
As for the customer service, the waiters will get you what you want, just as long as you flag them down and let them know once or twice about your order. For this place, go for the food, not the service!