Yong is a fantastic host! She is extremely friendly and helpful, very accommodating, and flexible about check-in and check-out times. The guides she leaves are very detailed, going as far as giving a step-by-step picture guide from the nearby subway station to the apartment.
The apartment itself is a very cozy nook to relax in after a busy day in Tokyo. You might find it a little bit crowded if you have lots of luggage or are a taller/bigger person such as myself for an extended period of time, but the comfort and fantastic location of the apartment completely outweigh the apartment's size. It is only a few minutes walk to the subway station, and a 10 minute walk to the nearby JR station if you have a JR pass.
Also excellent amenities nearby, including a ramen stall shop just down the street, excellent bars, supermarket, or excellent 24h coin laundry.
Thanks again for a great stay, I will definitely be wanting to stay here again the next time I visit Tokyo!