Unfortunately we didn't meet Shin but communication via messages was very easy and fast.
Shins apartment is the cleanest Airbnb place we have visited! There were everything that we needed. Perfect place for a couple but if you are not picky about smaller space then it´s good also for 3-4 persons.
The location is very convenient and 24 hour grocery store, cafes, restaurants, metro are within really short walking distance. Very quiet street.
We were there on March and just a reminder that japanise apartments in general seems to be a bit chilly because they don't have central heating. So be prepared for that. But heater was effective and the apartment heated up quickly.
We checked out on business day morning and were afraid that we don´t fit in metro with our luggage. Maybe we were lucky but around 7:15 on morning metro to Shinjuku station wasn´t full at all.
We would highly recommend this place and would like to stay there again!