Location, location, location. This AirBnb is just a 5 minutes (or less) walk from the Shin-Okubo Yamanote Line train station. The value of this cannot be understated. For those of you with large bags, the Shin-Okubo station does not currently have an elevator or escalator. But the walk from the station to the apartment is very flat from there. And there is an elevator on the property.
The apartment itself is pretty spacious for a Tokyo apartment. The beds were comfortable. There is an accordion-style separator between the main living room (with one bed in it) and the bedroom. There is tea and coffee if you'd like to make that in the apartment in the morning--the tea was delicious. If you are a light sleeper, please bring earplugs as the train tracks are very close and trains can be heard. We used our white noise app and were able to sleep quite comfortably.