What a great little place! I stayed here recently for a couple of nights when visiting Washington, D.C. to explore the sights.
The room is more of a small apartment on the lower floor of Linden's house than a room. The room comes with a private bathroom and a small kitchenette. If you like your privacy, this place is great; you have your own entrance at the back of the house.
The room is well-furnished and very modern. I found everything to work (including the air conditioning which was much appreciated in the summer heat!). The room is very secure; two electronic locks are required to be unlocked enter the room and the entrance is monitored by CCTV.
The neighbourhood is equally as notable. The room is a short 20 minute walk from Capitol Hill / Union St - great if you're planning to use the room as a base for exploring D.C. and/or of you're travelling by Amtrak. The room is a five minute walk from H Street which has plenty of great restaurants/bars to spend your evenings - Linden recommended Cusbahs and Boundary Road and I found each to be delightful!
Overall, I highly recommend this room and would definitely use it again if I revisit D.C.