Brad and Natasha's place has all the ammenities you could ask for any sort of stay in Washington D.C (it's very rare to see hosts proving guests with a washing machine and a dryer!) The place was spotless and it's very good looking - they have great taste in terms of decoration.
They went the extra mile to accomodate the fact that me and my wife are light sleepers by turning off the AC in the whole house during the night which couldn't have been nice for themselves.
There's also a (very thorough) binder with with everything guests need to know about the area and Washington in general which is a nice touch.
Overall I would definitely recommend you book with them if you're planning on staying around D.C.