The apartment is great. It's very specious for Tokyo, close enough to the train station to simply take a short walk there each morning (and not too long when you're feet are aching at the end of the day), and there are plenty of great food options in the area. Our one week stay was very comfortable and the apartment provided every amenity we needed during our one week stay.
As for the host - Shinichi was very helpful, both through the apartment and area guide he sent, and through private messages and requests.
Thank you Shinichi for a great week!