We recently stayed at M's apartment in New York. The location of the apartment was fantastic, close to great shops, transport and bars.
We found the aprartment very clean and modern, it was a little tight for two couples but i suppose that what you can expect from New York apartments. The only problem that we had was carting our luggage four floors as there are no lifts.
Overall great stay and would definately recommend this accomadation to anyone wanting to experience New York living.

Thanks M for your hospitality.