The place is very good, and from the description I thought that "spacious" were most likely an overstatement, but it is indeed spacious. It is also very cosy and has a "feels like home" atmosphere. All necessary things are there. The folding coach in front of the TV when unfolded makes a great double or queen-size bed. My daughter slept on the main bed, and I took the coach, and it was really comfortable. Cleanlieness was outstanding, possibly the best in my AirBNB experience. Merry, the host, was always in touch and repsonded to all our requests almost immediately.
The neighborhood is really nice. It is strange to be in a such a quiet, green, laid-back neighborhood in the middle of a big city. There are several good eating places in 5-10 min walking distance. We walked from the apartment through Georgetown to the waterfront, and really enjoyed it.
A couple of practical recommendations: (1) The public transportation from this place to the National Mall and museums is quite inconvenient. I recommend to take Uber or Lyft. (2) I do not recommend food trucks on the National Mall. The wait time is unacceptable, and quiality (at least in my experience) is about two stars. When you plan to spend a day around National Mall (and it is best to dedicate the whole day) I would recommend to take sandwiches and water with you. (3) If you leave D.C. in the afternoon, I recommend to do the Georgetown walk on the day of depature. You can check out at a proper time and then walk down the Wisconsin Avenue with your bags (if they are on wheels and not too heavy). Depending on your exact schedule, you can have breakfast, lunch, or both along your walk and then take Uber or Lyft to airport when it is a proper time. We flew from Reagan and this strategy worked beautifully for us.