This is a lovely place, and Pia and Ben have put a lot of effort into making your stay there enjoyable. There are laminated cards explaining how to adjust the heat/AC unit and the Sleep Number bed, notebooks full of information, games, books, a kitchen area with all the essentials and more besides, and even Metro cards for guests to add money to and use. In addition, it's in a very convenient location just a few steps from a free streetcar that takes you to Union Station.
This was only our second time using AirBnB, and we were very pleased. If we need to stay in the D.C. area again, we will definitely check to see if this apartment is available.