My visit to New York could not have been better if I stayed somewhere else.
First of all, location is perfect. If you arrive at JFK, it'll take you 45-50 minutes to get to the place (cab). Nearest metro station is in 2 minutes walk distance. From there you can reach heart of Manhattan by just 30 minutes ride. Moreover there are lots of interesting spots for each taste in the nearby.
Secondly, the room. It's nice, cosy and very clean and has everything you need. Special praise to the mattress. It's just a perfect bed. Bathroom is clean and absolutely in order.
Last but the most important point is the host. Mary is wonderful person. She can provide you with any necessary information regarding the city including some really useful tips of your interest. Moreover she is super friendly and open. I really enjoyed all the conversations we had.
I absolutely and totally recommend staying at Mary's if you are visiting NYC regardless of the visit's purpose.