Martin was a formidable host even though we didn't get to meet him. He left a complete guide of his apartment for us which describe everything to know about the apartment, neighborhood and the check-out. The apartment was very specious and in a very very secure building with amenities such as gym and a laundry place.
It was very close to the subway (the B and C line), and several blocks to the express lines (A,B,C,D and the Laguardia Train).
We would recommend this place for any trip in NYC.