I can very much recommend staying at Mari's apartment! The apartment was very nice and clean and there was no problems with noise from the neighbours or anything like that. The neighborhood was great with easy access to grocery shop, restaurants and subway. Also, Central Park was just one block away. Mari was a great hostess - nice to talk to and easy to get in contact with. On the downside, the oven in the kitchen was not working (the ad said that the kitchen was fully equipped) and the apartment became very hot at night when the temperature fell outside (we visited in the Spring) because of an automatic heater we couldn't turn off.
But all in all: Recommended!