The room is not spacious when you measure. However, thanks to the hosts' room organization, I never felt smallness and I really enjoyed the stay. (I stayed single.)
In addition, they prepare all the amenities that you'll need in your stay, including soaps, detergents, and very cute Japanese tableware.
The location is nothing but perfect: 10min to the most energetic city in Japan, and 3min to the nearest Yamanote-line station.
If you do not mind staying on the ground floor, or if you want to stay close to the brightest city but prefer a calm area, this room is ready for you.