The apartment is nice and centrally located in Harlem. However, in wintertime the heating valve in your room may disrupt your sleep as it makes the sound of a boiling kettle all night long. As a consequence the room was also rather damp which made me cough a lot.
I had a nice conversation with Carlos at the checkin. But there he didn't mention that he wouldn't be staying at the apartment and that there was a couple living in another room (which I found out step by step). This didn't cause a problem, but still I found it strange not to mention.