The apartment is good overall. The space is quite big, there are plenty of spaces to put all of our luggage. The apartment is very clean despite being quite old.
Location of the apartment is about 10 minutes of walking from JR station, but may feel a little too far for me personally, considering we have to drag all the suitcases from the train station. Without the suitcases it would've been fine. We got lost quite a bit while walking to the apartment for the first time, because we followed the instructions from the google map plus it was already dark. It might be best to just stick to the walking direction provided by the host. The instruction is quite clear and you wont get lost if you really follow it.
Facilities are sufficiently provided. For improvement I suggest to provide a floor mat on the bathroom and a rubbish bin inside the toilet.
There is some flights of stairs to climb to the door of the apartment, so for those who have problems with stairs may have to consider this. As for me personally, I travel with 2 elderly and 1 child, so may be quite tiring having to climb the stairs with all the luggages otherwise it would be fine. Overall, it was a good experience.