My parents had a pleasant stay at Antoine's place. There were some issues at the start of the stay with the handing over with the caretaker, which eventually got resolved. Antoine was understanding and responsive to fix the issues.
The place is cute and well located, you're in walking distance to a few different subway/bus stations and also gare du nord. There are nice restaurants and bakeries around.
There is a big hangoutplace/collection of restaurants very close to the apartment so it can be quite lively but also noisy till late at night (especially in the summers when you might want to keep the window open).
Aside from the initial hiccup the rest of the stay was smooth.