Great place to stay for the price. The main thing to consider is that the room is small. The bed will fit just right of the width of the room leaving a small space for your things. However, considering the cleanliness of the room and the bathroom it is worth it. They also provide amenities like towel (they gave us towels for free on thr 1st night) so it was nice.
This place is great for its location. It takes 3-5 minutes to walk to the Koenji station (straight road so no confusion). Only takes 7 mins to the Shinjuku station so it is very, very convenient. On a side note, the trains heading to koenji (Chuo) are covered by JR pass so another plus point for that.
Finally, on a personal note we think the service was great. We were late to check in but the host was very welcoming. We also didnt bring any adapters for the charger and he helped us find a place to buy it.
Overall, if you're looking for a simple place to stay that is near shinjuku/shibuya and you don't carry a lot of stuff, this is the place to go