The bulding is located in a very quite residential neighborhood, with a supermarket just around the corner. Not far from three different stations, from where you can reach all of the most important places of Tokyo.
i stayed in room 401. Very small, but not in a bad way, enough for people who are looking for a room just for sleeping. TV, air conditioner, fridge, boiler and muggs are there to used if needed. The Wi-Fi dropped a few times, when I was connected on my bed, behind the wall.
Overall a very good experience.