Ken's place had a bit of a rough start for me personally as I was under the impression that it was on a higher floor not the ground floor. The first sentence in the description was a room that had a lot of sunlight but in the winter I can assure that there was none. It was moderately well lit during the day with indirect light but as it was ground floor on a narrow street it was an issue for me right from the beginning as I was staying there long term. On the 2nd night the AC with the heater stopped working but Ken sent someone right away for repair. In fact, Ken was very responsive at all times which I did appreciate and you can tell they put a lot of fine touches into the apartment as it was very clean and very stylish with all new amenities.
One other point was that if you're a bit taller like I am than you will probably hit your head a lot as it is made quite small even for Japanese standards. Fixtures are very low hanging and the sinks are also very low. Took some getting used to.
All in all, I have to say it was a 4/5. Great place, the location is awesome and the host very responsive however, please remove the part about the sunlight and just know it is ground floor. If you're aware of those things I would not hesitate to recommend Kens place.