We had a great stay at Jen's apartment. The location is excellent, very close to Union Station and all the sightseeing attractions of DC.
The apartment has a separate entrance and own driveway to park your own car. It was equipped like a normal hotel room - microwave, fridge, flatscreen tv, airconditioning, bathroom. Jen bought as drinks and filled the fridge for us. She also left a basket filled with granola bars and coffee/tea. We came in pretty late (around 10 p.m.) and Jen was patiently waiting for us - the check in was very efficient, everything was well organized. I would definitely come back again if I ever needed a place to stay in DC.