We had an awesome time in DC and Greg's apartment was spacious, well equipped and in the perfect location for a weekend exploring DC in a charming, chilled neighbourhood close to the subway and many nice bars/restaurants.
Greg made everything easy with clear communication and was very responsive to all my questions during our stay. He even printed out some tickets for me and dropped them off as we were attending a Redskins game in town that weekend and I was foolish enough not to print them before we left!