We stayed in Tiger room (3rd floor) from May 30 to July 1, 2022. It was a great experience: like a home away from home.
That place has everything you would need for a long stay.
The space is big considering the location, modern, and beautifully designed. Two bedrooms give you some privacy, but you can easily talk through the divider (or hear your children) because the wall between the bedrooms doesn't reach the ceiling (a smart design allowing air conditioner to cool/heat the whole space).
The room has a clean design, great natural wood floors. A note for foreign tourists: you'll be asked to leave your shoes in the shoe box downstairs.
The only minor inconvenience was getting the luggage upstairs: there is no elevator. Consider packing light.
Location is also great: easy access from the airports or shinkansen, JR and different metro lines, a supermarket, several convenience stores, drugstore, etc. close by.
This place will be my first choice when I'll be visiting Tokyo again or recommending places to stay for my friends.