We came the first time based on the recommendations from TA. The food was very good. We had a variety of food over the three days. The pancakes and the corn beef hash was the best. The coffee was some of the best coffee I have had at a diner. The prices were very reasonable particularly for DC.
My only complaint was the service. It was not that busy when we came, but the service was slow. The servers spent most of the time talking to each other. One morning, the food sat in the window for a fair bit of time. The next two mornings we sat at the counter and when our server was not around, just grabbed any available server.
The quality of the food definitely outweighs the staff's laid back style.