Our family of four had a great time in DC staying at Luisa and Gonzalo's place.
The one-bedroom basement apartment was a tad chilly but we were fine with it. We knew that we could contact Luisa/Gonzalo if we really needed the heat cranked up. Also, we could readily hear the sounds from the apartment above but we fully expected this having read lots of Airbnb reviews in the DC area.
The location is primarily residential and non-descript but within walking distance to the museums and easy freeway access. A grocery store and the nearest metro stop is a five minute walk away. A parking spot is provided which was definitely a perk which we enjoyed.
The access to the apartment is automated via an app obviating the need to meet the owner(s) but Gonzalo did knock and introduce himself the day before we left which was kind of him and appreciated.
I would recommend this place for anyone driving into DC looking for a no-nonsense place to stay with parking and within walking distance of the sights.