My friend and I stayed at Gary's place for 2 nights. The room was nice, cozy, and clean we slept like Kings! The house was really easy to find and only 5-10 minutes walk from the streetcar that take you to Union Station, from were you can take the metro if you want to see different places of DC.
We never met Gary in person, but he was really quick at answering any questions we had via message.
Gary's dad greeted us when we came even though it was pretty late at night, which was really nice.
Great place to stay if you want something close to the center of DC.