Just had lunch at a fairly new Chinese restaurant aptly named "Dim Sum". It's in the shopping plaza at Gaither Rd and Shady Grove Rd in what used to be the Hunan Palace. They serve dim sum all day and have other items on their menu including multiple variants of congee. Ordered off a menu for late Friday lunch, but it sounds like they have carts that go around on Saturday and Sunday lunchtime. Had several standard items (Sui Mai, BBQ pork buns, shrimp rice noodles, bean curd wraps, shrimp chive du pings). All pretty tasty and piping hot as they were made to order.
Service was pretty standard although there was an issue with them not realizing my credit card is a Chip & Pin, not chip & signature and telling me that my card had been declined.