Higashi-Matsubara is an upmarket, quiet neighbourhood. The apartment is 5 minutes walk to the station.
The apartment building is quite new (no lift). It is a good size for one person. I wouldn't suggest 3 people can occupy this space. The walls between apartments are thin (as is the case with most Japanese apartments) so the quietness of your stay will depend upon the behaviour of your neighbours.
In my apartment, the blinds were of poor quality and were damaged. This meant that the room was permanently bright and I was unable to sleep past 6am each morning. I told the host and he was quick to respond, suggesting fixing them during my stay. However, this did not materialise and the situation didn't improve during my stay. The host did return some of my payment though, as a gesture of goodwill.