We stayed in Seiji’s apartment for a week in August. The location is excellent, within easy walking distance of Shinjuku but in a quieter neighbourhood. Transportation is also excellent. The size of the apartment worked well for the 4 of us (2 adults and two older teenagers) though we were out most of the time. The beds were very comfortable. It was fantastic having air conditioning and the pocket wi-fi was incredibly helpful. Although we arrived very late, access to the apartment was very straight forward. Seiji provided an excellent document with helpful information, including tips on where to eat nearby. We would definitely stay in his apartment again.