Very good Cantonese-style Chinese food. I've eaten here a large number of times, and I've had both the dim-sum (served during lunch) and the regular entrees for dinner. The food here is very different from the sort of Americanized Chinese food available at most places, and the quality is consistently high.
There is no sense in naming specifics because (a) i'm not sure what half the stuff is, and (b) it all tastes really good. I love the way they use Chinese broccoli instead of American broccoli, and use a variety of different kinds of mushrooms instead of the bland button mushrooms, etc. I've had good experiences with the dim-sum, the regular entrees, the large soups to share with people, and also with the casserole-style dishes (something that is not available in most Chinese restaurants in America).
The atmosphere is nice too--it's a big fairly open room, casual but still a little classy. This place is among the best place to bring large groups: you can get a large round table or two that has a spinny-thing in the center to make sharing easy. They also have serve alcohol at very reasonable prices. You can't go wrong with this place; I've had significantly worse food in both New York's and Philadelphia's Chinatown; this place could easily hold its own in either of those locations, although San-Fransisco might give it a run for its money.