I went to Tony Cheng's for dinner, and then dim sum the next afternoon. I've been going to this restaurant regularly for the last > decade whenever I'm near the DC convention center. Looking at the reviews on tripadvisor and Yelp, my impression is that people are often put off by the building being a wee bit tired and the wait staff being more efficient than friendly. That being said, the spring rolls come out hot , crispy (not greasy) and aromatic. The fried dumpling are perfectly crispy at the edges, and the dumpling filing of pork was gingery and garlicy. I had the soft shell crab with ginger and onions. The serving size is generous, and though the coating is soft from the stir fry with the onions and ginger, the crab is perfectly cooked. I also had a scallops in hot garlic sauce. The scallops were perfectly cooked and again - a generous serving. The sauce had a little bite that was balanced with the sweet. In terms of dim sum, this is real thing similar to what I've experienced in southern China. Each type of dumpling is distinct in its flavor - the shrimp taste like shrimp and the pork tastes like pork. May seem obvious - but some places have their dumplings tasting all the same. The wrapper is not over cooked. The pork buns are to die for - they are well filed with sweet pork - and they come out hot and steamy. Finally, any custard dumpling is a great but decadent way to finish the day. The serves may not be as patient as you want if you don't have dim sum experience - but don't be afraid to try new stuff and gamble.