My boyfriend and I booked the apartment for two weeks. We were provided detailed instructions on how to get to it from both Haneda Airport and Narita Airport. Additionally, the location is close to a local tram and train station, which made transportation easy. The area was also quite quiet and very different from the more urban areas of Tokyo, which I found to be nice. Yuka was very courteous and responded quickly to me when I had questions before and during the trip. Check-in and out were also very smooth!
The pictures given are true to what the apartment looks like. We were given basic amenities (although we did have to buy more toilet paper and would've liked extra sets of linens) and there is a 7-11 close by in case you need other things. For more specific cleaning supplies (i.e. wet wipes), you'll have to travel further. Things like the washing machine and air conditioner remote have settings labeled in English but it would have been nice to have more detailed instructions. We got the hang of the washing machine overtime but drying things was an issue until we started hanging the towels outside. I asked Yuka about the air conditioner and she was able to help us with that. Another thing to note is that you are given a portable WiFi, which was the most useful thing ever.
I'd say the space is a tad cramped for two people (although I had no qualms with it), so I can see it being an issue for someone looking into staying here with a friend as opposed to with a significant other or by themselves. But, it's a stylish place! I also think my issues regarding extra linens/toilet paper are likely due to the length of my stay as opposed to the host not providing enough; but, it is something to note if you want to book this place for longer than a week.
Overall, I think staying in this apartment was a great experience and good for my first time in Japan. I would recommend this one and Yuka's other listings as well, especially if you are planning to stay less than a week. If you'll be there longer than a week, be prepared to pack maybe an extra blanket or towel.