In short, the portions are large and food is filling. Don't mind too much about the service. I highly recommend it if you're looking for practical, greasy, Chinese cooking.
The biggest advantage of the restaurant is that it delivers to the university campus for no extra charge during late night. They offer a standard selection of x on rice, y on noodles, along with soups and miscellaneous items. The menu is quite large and they always give you extra copies when they deliver.
The food is comparable to New Ho King next door which also offers similar late night delivery but personally I think the service is a lot better here. If you call in for delivery, the person on the other end can seem a bit aggressive and rushed but I wouldn't mind it too much. Also, they prefer cash and ask to charge a dollar fee if you offer to pay by machine. Try not to order right before closing time as they might refuse your order. The drivers are regulars and they can be friendly if you banter with them.
As for the restaurant itself, it's a bit run-down and dirty but that isn't supposed to be its strength. Interestingly, the walls are plastered with cute drawings on paper -- from customers I assume, which is kind of cute.