Koichi's apartment is very well located, you can walk around Midtown Manhattan within minuts. There are also a few tube stops nearby.
Regarding the room it was very nice and tidy, although one of the beds was not very comfortable. The communication with the host was very quick, as we had to ask a few things and contacted us back with no problem.
We also kept the luggage there on our last day and kept in touch via phone with th e housekeeper and was very efficient.