Kazumi's studio is very well located, on an avenue between Trocadero and the Arc de Triomphe and just a few steps from the metro station (Boissière, line 6). The apartment is small, like most places in Paris, but clean, with a good shower and heating.
Kazumi welcomed me at her studio, helped me with the luggage and showed me where everything was and worked at the apartment. The place has an elevator, but it doesn't take you exactly to your floor, which was weird - floor 1 1/2, 2 1/2 and so on... so I never used it.
I think most of the apartments at the building are rented, so the other guests can be a bit noisy, Kazumi have warned me about it when I arrived. But since I was barely in, it wasn't a big deal for me on most days. She was a lovely host, very helpful and thoughtful. She printed a map with the closest markets and even baked cookies on my check out day!
I definitely recommend her place in Paris and hopefully will be able to eat the cookies next time!