We loved the apartment which was bigger than it looks in the photos and very comfortable. We are a family of four so used one double room and twin beds in the second bedroom. These were all very comfortable.
The apartment is close to the subway so easy to get around from. We went to Central Park, The Empire State, Statue of Liberty and Ellis Island, Top of the Rock, Gugenheim, The Natural History museum (not to be missed) and The Intrepid Air and Space Museum (a very good day) and walked The Brooklyn Bridge. We were busy, but found transport on the subway easy.
Negra helped us out when we asked for information eg about taxis to the airport, but we had no problems, so no need for further communication.
Loved our stay and would definitely recommend.