I also had a great time in NYC and the apartment is well situated near the center (Times Square / Central Park) and Columbus subway station.
Shun and Akika were pleasant and although I came in late every night they hadn't an issue and even allowed me a late checkout.
Apart from what Steffen F. mentioned you also have a working window Air Conditioner (AC) in the room - much needed for the upcoming summer.
One comment is that the bed is a standard "Double" Width - 55" / 1.4meter which is nice and large for a Single.
Thanks Shun for a great "In Manhattan" option and allowing me in so late at night, I do hope to stay again ;).