We had a really nice stay here at the apartment. It's very central, close to the metro and one of those capital bicycle stations. Everything was exactly as Abenaa wrote in the description. Especially the huge tv and the specious bathroom were a nice bonus for our stay here. Comfortable bed for two. The only thing I would like to mention which could bother some people is the heating system or something similar to that (I'm not completely sure what it is) sometimes starts in the middle of the night and is quite loud for a couple of minutes. This could be annoying for people with a very sensitive sleep.
But overall - especially for the money and the location - everything was really great and I would definitely recommend staying here in your trip to Washington.