I stayed here for 6 nights. The flat is conveniently located 5 min walk from JR Oimachi station. There are many options for restaurants and several grocery stores nearby.
The flat is very clean, with new equipment and furniture. Check in and out are made with an iPad set up at the entrance, and it worked well for me. I felt very secure to be in the flat.
The kitchen is sufficiently equipped for a short-term stay, but it may not be enough for long-term.