Lovely (small) apartment. Happy with my stay in shinjuku. Although it was a small flat it was well equipped and very clean. Only down side was some noise at night, but if you have had a long day walking you would be too tired to notice anyway.
Owner let me check my bag in early so i could explore without luggage which was great, and was fast at replying to any queries.
I would definitely recommend this place for a mid city apartment stay!
Many thanks
Dan