Mark's apartment was great!!! It's clean and very comfortable. We were there for 10 days and I would highly recommend it.
It was located in a nice neighborhood, near two subways stations, Central Park, Lexington Ave. and 3rd Ave. with a lot of restaurants and shops where you can buy everything you need.
Mark is a nice host, he was always available for help us and if I will come back to NY, I would stay there again.