We really enjoyed our time in Lexie and Graham's apartment (2 couples + 2 kids) - Lexie was very friendly and helpful when we first arrived with all our gear on their doorstep and had good recommendations for us and clear communication throughout.
There were two Metro stops within 5-10 minutes' walk of the house, the closest was probably Georgia Ave/Petworth but the Columbia Heights stop had the convenience of lots of restaurants, cafes, a good supermarket and a Target. The apartment was well stocked with coffee, condiments and a range of groceries as well as craft beer and bottled and filtered water - all much appreciated! The projector set up was great and the boys enjoyed having a go on the drum kit too. Plenty of towels and bedlinen provided, as well as eco-friendly cleaning and bathroom products. There is a separate dining room and a balcony overlooking the backyards of the local houses - the living areas were all very sunny and light. Of the three double beds provided, one was a futon which was fine for the kids but might not suit some people, and the second was a large, comfortable fold-out sofa bed in the lounge.
A great place to stay for a visit to Washington!