Great location, easy walk to the zoo and great restaurants, with bus/transit options to other destinations. Great host, responsive and friendly. We had a great visit to DC, and Grace's flat was very comfortable for us.
Only advice: If you're short and its hot out, ask for tips to getting the back air conditioning unit on and adjusted (located above a door) before you're trying to figure it out in the dark while others sleep (like I did during a June heat wave.)