I have been using Airbnb for years. I have stayed at different places not only in the US, but also in France, Italy and Spain ... Yet, never had I experienced what happened to me with this host.
It was my first day in DC. I booked the room, he agreed and, then, he chose to cancel my stay a few hours before check-in time. He sent me a message at 10:51 (I didn't see it till midday) saying that the person occupying the room wanted to extend his stay for one night, so the host decided to throw me under the bus. What about the reservation I made and the money I paid? It didn't make any difference.
He later informed me that he was working on a solution, a solution that never came and it was after 3 pm! His best suggestion was a couch. I pay him $60 to sleep on a couch! That was before he stopped picking up the phone!
Unless you're ready to spend the night in the street, don't choose this room.
WORST EXPERIENCE EVER.
I DON'T RECOMMEND
(The airbnb support guys were nice and helpful)