The apartment is a typical Japanese one room apartment, with kitchenette, bathroom, separate toilet and a single combined bedroom/living room with a small desk. It was perfectly fine for a short three week stay. There is enough room for one's suitcase (which can often be a problem in hotels in Tokyo) and there is a big closet for hanging clothes. The apartment was sparkling clean and tidy. There is also a balcony, but it is useless due to the traffic (see below).
Nori responded very promptly to all enquiries. The self-service check-in process didn't work, so I had to call to obtain the room door code.
The apartment is located next to a very busy main road and elevated expressway, so there is substantial traffice noise. This is clearly disclosed in the property description, so no issue there. I personally sleep with earplugs anyway, so I didn't mind, but anyone who is sensitive to traffic noise or prefers to open the window (which basically is unberable in the place) should probably look for another apartment.
Overall, this is a clean, functional place, within reasonable walking distance (15-20mins) to Roppongi's night life district and a subway station on the Oedo line (which will take you directly to Roppongi and Shinjuku) almost right outside the apartment. It was perfect for me due to its location near the work project I was attending. The service and response time from Nori were impeccable.