You'll definitely feel at home here. The host is very down-to-earth and welcoming.
I wasn't expecting much other than just a room to stay in and the listed utilities, but the relaxed social atmosphere made it feel like I was staying at a relative's place.
The house itself has pretty much all you need for daily necessities, and the rooms are comfortably equipped with air conditioning. I stayed in the Japanese style room on the 1st floor, which connects to the backyard where you can hang your laundry to dry.
Neighborhood cats like to wander through the backyard, which is a plus in my book.
If you're a bit tall like me and need to get lotsa work done on your laptop, the Japanese style room might put some strain on your back.
However, partway through my stay I realized the oshiire closet was just about the right height to use like a desk, and they were kind enough to let me use one of their chairs to set up in front of it when I asked about it.
You could stay here comfortably for a pretty long time, and the location is fine with various grocery shops and other shopping in the area, and kokubunji station not too far off. They have bikes for guests too which really came in handy.
Overall I'd really recommend staying here!