This is one of the best places to stay at and see DC! Very near Grand Central Station (Metro and all) and the Capital. The apt itself is fantastic! As we stayed in the winter the radiant flooring made the whole place feel warm in a basement apt, when the ground had gotten cold outside. I've not seen these outside of the upper Midwest, and its part of the secret of this place that makes it so great!
Additionally you find that the place is furnished/stocked with what you really need to live there with 2 couples. The kitchen had everything that we needed to cook dinners & breakfasts.
The bathroom was accessible from both the bedroom, and the hallway with locking doors. The bathroom itself had everything you might need, so if you forgot one item, it was there in the medicine cabinet. (We fortunately did not, but what a fantastic find!).
Betsy really set this place up superbly and we wouldn't hesitate to come with our two young daughters the next time we're in D.C.
The parking pass was very handy too, and Betsy was great about communication as well.
It was such a great place to go back to after getting stuck in the rain near the National Mall.
In all our years of AirBnB, this ranks as our #1 stay.