The place is just perfect. Located a few minutes walk from Shinjuku or Shin-okubo stations, making it very easy to go almost anywhere in Tokyo.
The apartment is clean and furnished with everything one need for a nice stay. Our host was very helpful from the very beginning and always answered our questions as soon as he could, making the check in/out a breathe and the stay comfortable.
Located in a busy street, once you've passed the door you can't hear anything.
Definitely recommend it for anyone who is planning a trip.