This place was amazing!!! Everything was as advertised, Rumika was amazing from the beginning.
Before I even got to Japan, she gave me tips on how to get to the Airbnb. Very simple and detailed instructions made my first time in Japan a walk in the park. The bathrooms and bedrooms were all very clean and well decorated. The stairs are a bit narrow so be careful if you plan to lug your luggage upstairs.
The location was great, we were only about 15 min walk to Shinjuku station and there are plenty of food available there and some even opened 24 hours. Around the Airbnb has places to eat as well, but be aware that most of the menus are only in Japanese and very small where large groups would be a bit hard.
Overall I would definitely book this place again and Rumika was soo nice to let us have a later check out since our flight was in the evening.