I haven't met Gary during the time my sister and I stayed there, but he was always available to answer questions.
His parents, who live in the house, helped us with whatever we needed. They were very nice and friendly. We liked the dog which is full of energie very much :).
the room was furnished (bed, mini fridge filled with water and juice) and everything was super clean (kitchen, Livingroom, bathroom, bedroom...)
On the bed was a map with a list of suggestions for local Restaurants/Bars, the house rules and other helpful information.
The neighborhood isn't the best ... we only went on the street at daytime ... When it get's dark we drove home with a taxi, because we are only two girls and felt afraid in the evening in this area.
But the street car to the city center was for free, so i think it's fine to pay 10$ from Union Station back home safely.
We enjoyed the stay at Gerys house and recoment it to everybody who want to take a short trip to Washington DC :)