The location of this place is great and very convenient, near the station. Not exactly shinjuku, but about 12min walk to shinjuku area, and in between shinjuku & shibuya on the super convenient yamanote line, so you can easily reach either place. Checkin/ checkouts were smooth. Unit was small, but that was expected in this area. Also convenient that host provided convenient pocket wifi for guests.
Just couple things to be aware of:
1. If you're a light sleeper, you may not be able to sleep that well. The air mattress on the ground was a fairly cheap quality, where you could feel the spring coils when you move around. Also being right next to train station has a downside of trains being noisy every few minutes when trying to sleep. We had to use ear plugs.
2. Be aware that it's a 3rd floor walkup with no elevator, with extremely narrow staircases. I was able to carry our heavy suitcases up and down with some challenge. You may be fine, but just something to be aware of.
All in all, the place was clean, safe, and convenient location wise, and still a fair value considering the region. Just be aware of the 2 things.