We went to New York over New Years time. The apartment was a perfect option as a stay since it's a good place to escape from the stress in the city. We got a lot of help offered so there haven't been any problems regarding the stay, taxis, restaurants etc.
City island is a beautiful place and the apartment is right at the waterside so I bet it's a great place to spend summer. We enjoyed the stay very much!
Thank you Noelva and Alex and many greetings from Germany!