The apartment is spacious. The living room is good size, together with a dinning table. It is very clean. We are allergic to dust, smoke and smell, and always concerned about the cleanliness. We had no issues at all.
Communication was very easy. YK provided clear instructions.
The location is good. A grocery store is right around the corner. We got breakfast like steamed buns and soybean milk from there. It has an ATM to withdraw cash, also from US bank. Metro station is nearby letting us go to the center of the city very easily, like Ginza and Imperial Palace. Ueno is only one stop away. We took the Skyliner express train from Ueno Station to the Narita airport in just 44 min.
Noise separation is an issue, since the walls are not all the way to the ceiling.