We had a great experience at Adam and Jen's - the apartment was cozy and we didn't feel like we were in their way or anything, which I'm always a little wary of when using Airbnb. It was a smidge out of the way (for what we were doing, anyway) but the only reason that was even a fraction of an issue was because it was, like, the coldest week of the year in DC! The spot is really close to some great food, though, so that was perfect.
The apartment was clean, they were available if we needed them, and overall it was a really enjoyable/easy stay.