My partner and I stayed at Nanako's place for ~3 months and I couldn't be more satisfied with my choice.
The photos she uploaded on the listening are very accurate. I was impressed by how clean everything is. She also put little notes every where so you know won't need Google or anything in order to know how to use to washing machine (for example). The fact that the building is so new, it also has a certain modern vibe to it and the way it was decorated makes you feel very homey, overall the flat has a very cozy feeling to it. I especially appreciated that everything was provided from towels to cuttlery, even shampoo, dishwashing soap and laundry detergent. I think the bathroom is pretty spacious, bigger than an average bathroom in Tokyo (I guess). There is really not much negative to add to the flat since everything was so perfect, but what I did find strange is the hours one was able to take the trash out, which was usually around 4AM-8AM and it was expected that you take your trash during these hours, but my partner and me always checked whether someone from our appartment already took their trash out at hours such as 8PM and there was!
I loved the flat's location! It's very well suited for long stays since you have so many supermarkets around you (there is one just a few seconds away from the flat). The appartment is surrounded by 3 different train stations which means that you are never more than 15 minutes away from any destination you may want to go. I also think that you live in a very safe neighbourhood, it was very peaceful and the people are so friendly!
To book Nanako's place is definitely worth it! If you may have any doubt, I always got an answer within few hours. If you have any questions she always gives you precise answers and her instructions were always very clear.
So if you want to have a flat you are happy to return to after a long day in Tokyo I really can recommend Nanako's place.