Location is very good, close to Shin Okubo Korean restaurants, and only a 10 to 15 minute walk to the main part of Shinjuku. Despite that, it’s still quite quiet in the apartment.
On the not so good side ... request to extend booking was not dealt with promptly. I had to follow up with an additional message to get a response.
In terms of value for money, it’s probably average. (Taking into account size, condition, location)