The room was sparkling clean, had everything we needed (they even did room service each night), and close to several subway lines (2 min walk to Higashi-Shinjuku lines and 12 min walk to Shinjuku station). There was a 7/11 right outside the building and several really good restaurants nearby. There were several Korean and ramen restaurants within a short walking distance. For being in the middle of Shinjuku, it was very quiet at night. We knew the room would be small, and it was as expected. As a 5’11” person, it was a little uncomfortable because I had to duck my head going into the bathroom and the bath. Be aware that if google maps to direct yourself there, it may be a street or two off as it is hidden in a residential back alley. We felt very safe and there is staff to help with anything between 8:00-22:00.
All in all, a really great experience.