Everything was fine, but first time when I tried to get to the guest house, the google map lead me to wrong place. So the advice for the other visitors, ask the owner to give you picture guide to get a guest house. She will help you.
The house was very near from Shin-Okubo station, so I could go anywhere I can go easily with the subway.
Me and my friend will use this house for next Tokyo trip in this winter.
five out of five!