I have been going to this place for years. They have a wide range of movies and tend to have many really hard to find titles. I also enjoy their directors section, cult classics and BBC series.
They also have staff picks, a good range of indie/foreign titles and knowledgeable staff that are very friendly and honest. It's much smaller than Scarecrow, so you can't expect that kind of diversity, but if you are in the capitol hill area, its definitely the best choice.