It was totally worth it to stay at Keith and Kaori's place. The room and the bathroom were well organized and cleaned. I also had access to their kitchen. The house is a little bit far away from the city center, but there's a bus that passes really near to the house, so it's totally fine to move around in the city.
Keith and Kaori also have a cat and he is so well behaved that you almost don't see him in the house.
I highly recommend staying in their house!