My fiance and I stayed with Ellen and Pablo for a 4 day DC trip and loved it! They are incredibly sweet and the place is lovely. Ellen and Pablo provided detailed information about local places to eat, the metro, using the locks, etc. - basically, any questions we would have. We didn't really need to contact them during the stay, but they seemed very reachable and were definitely approachable. The full kitchen is so amazing to have and they provided some staples to get us going. There was plenty of coffee, which was amazing to have as well! We walked to the metro or took the bus to the metro every day, which isn't very far at all.
Overall, we loved our stay! 10/10 would recommend this wonderful airbnb!