Me and my fiancee stayed there for 3 nights.
The address is very easy to fine. We called Shunichi, and a friend of his waited at the apartment. The room is large enough (we had 4 pieces of luggage), clean, with everything you need in it. The bed is really ok, large enough for 2 people.
We felt really nice, it’s like a hotel room :). You don't see anyone around and the bathroom was always available.
We’ve walked most of the time, the place is in a safe area and close to most major things to visit and see.
This is really a great stay for visiting NYC.

Thanks Shunichi!