The apartment was tiny but great. I loved the neighborhood and the fast access to the underground station.
I would recommend no more than 2 adults and 2 kids. It was easy to communicate with Sora and the instructions were detailed.
The balcony is a common one and you don't have a direct access to it from the apartment, need to get out of the house.
We found lot of hair on the floor and didn't like it. The blankets and mattresses of the bunk beds were clean, while the ones of the futon had stains and hair. This aspect can be improved.
You find everything you need: plenty of hot water, washing machine, cups, dishes, soap, Tokyo maps...