This apartment is in a good location, very close to Shibuya station, which is very convenient for traveling around Tokyo. It is right in the middle of a bunch of bars and clubs, so the area can be a little rowdy at nighttime but not dangerous. Since the apartment is on the 9th floor, you can't hear the noise from the street.
As for negatives, it is a bit cramped, so I wouldn't recommend it if you plan to stay in the Airbnb for long periods of time. This is essentially just a place to sleep for the night if you plan to be out most of the day.
When I checked in, the place was a bit dusty. Also, the hand soap dispenser was out of soap, but the owner sent someone to bring me a refill of soap the next day.
Overall a decent place if you are okay with some tradeoffs.