I had a decent experience. I stayed here for about two months for work. Below is my experience, documented as impartial and fair as possible.
Location is pretty residential and quiet, about a 10min walk from the station. Check-in was self-service and straightforward. Communication with the host was fairly responsive, no complaints there. There were also a couple beers in the fridge, which was a nice touch.
Space itself is pretty cozy, but this is standard for a Japanese apartment. Really, no more than two guests should stay here. Even just one person was a bit of a squeeze especially if you have a lot of luggage. Despite this, the apartment has pretty much anything you need as far as essentials go (cooking, laundry, bathing, etc.) One thing that was disappointing was that there weren't really any cleaning supplies for the floor. I was living there for two months, so as you can imagine it got pretty dirty. I had to buy a cheap floor duster, but honestly it would have been better to have a small vacuum cleaner or something. (The host said I can request to borrow a shared vacuum...but, am I supposed to do this every couple days?? Sorry, that's kind of inconvenient.) Also for some reason there was no trash bin. I had to buy that for myself as well. Pretty weird.
Cleanliness was fine, except the bedding smelled strongly of campfire when I arrived. It took a couple of really thorough washes to clean it. I'm guessing the host (or whomever they're using for cleaning services) just washed it once, but campfire has a way of really clinging to fabrics. So it's forgivable but definitely sub-optimal.
Other than that, my stay was pretty good. Four stars. I would recommend it if you're staying short-term.