Midori's place is in an excellent location in Shinjuku. It's about 10-15 minutes walking from the Shinjuku station and was not difficult to locate at all. It is in a quiet building and we only ran into the neighbors one time. Midori was responsive when we had questions, but left us alone for the duration of our stay. I would recommend checking out the ramen and okonomiyaki restaurants across the street as well, they are delicious! Don't hesitate to book Midori's apartment!