If you're downtown this is a great place to call for delivery. They are open quite late. Maybe the only drawback is you sometimes get someone on the phone who has trouble understanding you, but it usually works out.
I've never eaten there but have stopped by to pick food up. It was 1:30 am and the place was packed! It's one of the cleaner looking establishments along Spadina too. Good and quite authentic Chinese food.
I recomend the General Tso's chicken, or the Kung Pow. Also the "hot 'n sour" soup is quite good. The tofu is also very good if you dig tofu. All the staples too: rice, spring rolls, egg rolls, chicken balls. However pass on the Chow Mein, it's not quite what it should be.