Everything was very well, John was very available before and during the trip to answer all our questions !
Unfortunately, we haven't saw John because he was not available but he organized everything to recover easily the keys of housing.
The appartment correspond to the description and it's idealy located ! The district is very good. The metro station and right next door ! Central Park North at 10 minutes walk ! And there are many restorations around (grocery, bars, restaurants...).
We have much appreciated our stay in New York. I recommend this place to anyone !