Place is great, what you see in the pics is what you get, it is clean, close to metro station(s), close to convenient stores and pharmacies, walking distance to Government Building (where you can go to the 46th floor for free to watch Tokyo from above)
Kazumi is responsive and helpful with local tips.
Japanese people in general will go out of their way to help you, very polite and just amazing people.
Don't expect a lot of space to store your stuff in the flat, but yet again, it is a good size in Japanese standards.
Flat / area is very quiet and safe, I would highly recommend the place.
PS. I Miss the toilet seat already!