Get the dinner for 4 if you're going in a group- it's a lot of food at a very good price, $70+tax. It changes regularly, so be sure to ask your waiter. If you plan to go there for Saturday dinner, get there before 6 or be prepared to wait for a while.
Lee Garden offers some of the tastiest Chinese food I've had in Toronto thusfar. All of the dishes were nicely prepared and tasty, and came in large portions. I particularly enjoyed the Szechuan chicken and the deep-fried shrimp.