The best Peking duck anywhere, bar none. Last night we went again and they did not disappoint. Not the biggest duck around, but certainly the most flavorful, and lean (for those who like your layer of fat, this is not the place). Served with pancakes, not the steamed buns (which I do not like).
The other signature dish here is the "fan pai", with a mustard sauce that has a good kick. We also had Shanghai boiled dumpling and a couple of other dishes. But the reason to come here is the duck, no question.