I stayed here for my first month in DC, after I'd moved here for a new job. I was very lucky to choose Mark's place.
This is one of the more enjoyable AirBnB experiences I've had. You could imagine a television reality show: a big old house, six bedrooms (not all occupied) and some very different people trying to co-exist.
We ended up becoming pretty good friends, cooking together, making music, going out together, etc. I'm sure it doesn't always work out that way, it depends on the chemistry of the guests, but I felt blessed.
Mark and Jake are good hosts, the neighborhood is quirky and attractive. A really nice introduction to DC.