Location is awesome. Service is not so awesome
I stayed here for three days in January. It is literally a block from Capital Hill, which was awesome as I stayed there during the State of the Union and got to see all the preparations up close. It is also one block from the Metro, which is the best way to get around DC. 
The service on the other hand, wasn't so good. I kept having problems with the TV sound going out and reported it multiple times. The night before my scheduled departure, I was informed by US Airways that my Flight out of DC had been cancelled and I was rescheduled on a flight later in the day. I asked for an late check out, and was assured that wouldn't be a problem. On the day of my departure I went out to buy some more souvenirs at a couple gift shops. Before leaving the Capital Inn and Suites, I went to front desk to, yet again, complain about the TV sound going out. I also reminded the front desk clerk that I will be checking out late and I was rudely told, "Are you telling me or asking me," in a stern tone. I said neither that I was informing you as I already asked last night and was told it was ok. 
Although my experience at this hotel was mixed, I would stay here again due the location, the comfort of the room, and oh yeah "the location."