We had a really great time at Dan's. My girlfriend and I stayed for two nights and everything was as described. The location was 10-15min walk to the Columbia Heights metro station so it was convenient. The neighborhood is undergoing many changes and gentrifying. We felt comfortable walking around during the day and night.
Dan was really welcoming and made sure we had everything we needed. The house is huge and really feels like a home. Dan has put a lot of thought in making the place feel welcoming and convenient. During the day we had the house to ourselves if we wanted it.
I would recommend to anyone to stay there if they're looking at a place in the neighborhood.