Hiroyoshi is a really friendly and welcoming host! He was always happy to help and responded very fast to questions we sent him per email.
With the suggestions he sent us in advance and the YouTube Video he made, it was really easy to get the right trains from the airport to Hikifune Station and to find the apartment from there.
The area is quiet, nice and non-touristic, but still located in Central Tokyo. It's a 10-15 minutes walk to Oshiage Station/Sky Tree. Supermarkets are nearby, some of them open 24 hours a day.
The apartment is small, but sweet, and we found it to be very comfortable for a couple. There was everything we needed, everything seemed new and was very clean. The major functions of the equipment are described in a "manual" which also contains some important and useful information regarding the location around the apartment and the everyday life in Tokyo.

For us it was the perfect place to stay during our days in Tokyo, and we would come back any time!