This is a nice, newly renovated place. While it is small (for westerner's standard), it is actually quite large per Japanese standard. It is extremely clean, and the pictures are accurate. It is rare to find a place all to yourself in Japan.
Mei is an extremely nice host. The instructions she provided were quite extensive and detailed. We had no problem finding her place from Haneda Airport to Yahiro Station (no transfer), and from Yahiro Station to Mei's place, with pictorial instructions to tell you exactly how to get there.
Self-check was efficient, and all instructions were provided before hand. You are advised to pre-register/check-in first, as you will need to enter information for each occupant.
This is a two-stories house. The second floor is basically one large bedroom with 3 double-beds, plus a small washroom with toilet/sink. It is equipped with 2 air conditioners. The main floor has 1 bedroom (with a double bed), a small kitchen, a toilet, a sink, and a stand-up shower. The bedroom also has an air conditioner. Everything was new and extremely clean.
Location-wise, it is mixed blessing. It is about 7 minutes walk away from Yahiro Station, but the house itself is located right beside a very busy street. Thus, while it is convenient it nonetheless is a bit noisy due to street traffic.
Mei was extremely thoughtful and responsive. Everything was communicated via the AirBnB app and she typically responded very promptly. We communicated in English and had no problem understanding each other at all.
Over all, if you are looking for a place all by yourself with room for a large family, I would recommend this place.