I used this place for a month of remote work in December.
Check-in was wonderful. The host was a very kind and cheerful lady. She picked me up at the station, was very flexible with the time, and showed me around upon arrival. She was very proactive during the entire stay and provided me with anything I needed.
The place itself was suitable for work. It had a dedicated workspace, and the Wi-Fi was excellent. There were MANY amenities at your disposal (even more at the main building).
The location was peaceful and quiet, 15 min from the train station on foot. Convenience stores, restaurants, etc., were within walking distance.
Check-out was just as wonderful.
There were only two things I didn't like. I was under the impression that the washer was private in the apartment, but it was accessible in the main building for 100 yen. And the entry room didn't have A/C, so the average temperatures were around 12 degrees.
But overall, great place with a wonderful host. 100% worth it.