I spent two weeks here by myself, and the house definitely was big for one person. I could have comfortably stayed here with 4 people. The house is very close to a station with easy access to Shinjuku and other areas, and there are plenty of shops and restaurants within a short walk. The house was very clean and had everything you might need, even the convenience of a washing machine.
The only downside was that the TV did not work and the pocket wifi had a data limit, which made streaming impossible too.
Overall, I am happy with my stay here and I would choose to stay here again.