I stayed this apartment for two months, May and June.
Pros:
Martine and Antoine are nice hosts. Martine welcomed me and explained everything I needed. While my flight was delayed and I was late for check in, she was waiting for me and did not blame about it. Antoine took care of the mice issue by blocking the holes (see below). They responded to my inquiries quickly. The location of the apartment is ideal, as it is located at the center of Paris, and very close to restaurants, bakeries, supermarket Monoprix, and the metro station, all of which are within 5 min. walk from the apartment. The room is wide and full of sunshine, and has the kitchen, bathroom, bedroom, and fast Internet connection. There is no lift but it is at the first floor so it was not a big problem for me. The price is low compared to other places in this region.
Cons:
While it seems normal for apartments in Paris, there were mice. During my stay I saw a mouse running inside the room four times. This was because there were holes under the sinks in the kitchen and bathroom, at the wall in the bathroom, and at the corner of the door, from which I saw the mouse were entering and exiting. I asked Martine and Antoine to block the holes, and they blocked all the holes. Hopefully mice can't enter the room now.