My husband and I are Manhattanites and stayed for almost a week while 'neighborhood shopping' for our next apartment. Sarah (Josie) and Christopher are a warm, communicative couple with a cute apartment in Washington Heights.
As the listing states, you'll have the private bedroom and bath (which is slightly separated from the rest of the apartment), and access to the kitchen. The bedroom is huge, especially by NYC standards, and is comfortable though fairly spartan. The furnishings have been changed since the photos were taken, though that was not an issue for us. There is now a table in the room, which we used as a desk.
Washington Heights is a fairly quiet and removed area of Manhattan, but if you want to be in that neighborhood for any specific reason (like we were), the apartment is well located and pretty close to the trains. Overall, we had a good experience!