Mark's house is brilliantly located at the centr between Dupont circle and Adams Morgan.
The room I stayed in was very spacious, very comfortable bed, plenty of towels. The rest of the house, kitchen and lounge were very comfortable as well which made for great breakfast and relaxing evenings with other people that were staying in the house. Mark was very responsive to questions and queries and always responded very quickly which was fantastic since it was the first time I used airbnb. All in all a great experience and highly recommended place!