If there's anyone who's hesitating to choose this place, don't worry. It's definitely the best.
Conversation with the host is possible comfortably in English.
It is close to subway station and convenient to go to Shinjuku or Shibuya etc. It's big enough to hold four people, and the facility is clean and nice. I think it is the best place to travel between family and friends. Thank you for your family being so comfortable during your stay. Seven Eleven, located on the first floor, was very useful.
I can compare it to five star hotels.