This is a great location to explore DC if you have younger kids. The couch easily sleeps 2 kids and the park behind the house is a bonus if all the walking does not totally wear them out. Not really walking distance to the metro but if you are into exploring by foot then walking to the either end of the Mall is doable in under an hour. Else it's a quick Lyft to more of the attractions.
There is no convenience store within a 10-15min walk so plan accordingly.
Our kids especially loved the snacks that were left as a welcoming gift. The apartment is clean, spacious and feels really comfortable. The little bistro table and chairs at the rear entrance is a great way to start to the morning with a coffee and a view of the beautiful park behind the house.