Gary and his place were just perfect!
First of all, the location is ideal if you are trying to access it from the Union station, the new DCstreetcar line offers a cheap (free) and convenient way to get to the house. The restaurant on the H street were also nice, we recommend a Mexican Sol restaurant. The neighborhood seemed pretty safe. Although we were not around on the streets in the middle of the night.
Second, the room was amazing! When you enter it you suddenly think if you actually booked an Airbnb or a hotel room. In the house you have everything what you might need. Plus, it's very clean, we loved it.
Thirdly, we were mainly hosted by Gary's dad who is a very kind, warm and helpful person! He will help you with whatever you might need. Thank you, Daddy!