Overall it was a great! The airbnb is very well located in the 13th arr., from where one can easily take the public transportation to go anywhere in Paris. There are several markets and restaurants nearby.
There is enough space and beds for 4 people. The apartment is very well equiped with machines, plates, cups, oven,… Everything was very clean and working as expected.
The communication was very good during the stay, by both Martin and Airbnb host (Nathalie).
There are only two downsides:
1) the apartment is accessed via a door in the middle of the street (ground floor). Sometimes you can here people walking/talking nearby and may not feel safe, despite being a very quiet and calm location.
2) the heating works well, specially the main one to heat the bed above the bathroom on the main floor. However, the heating is not sufficient to maintain the whole main floor (sofa area) warm (at least in early december) especially due to the crevice on the main door, allowing cold wind in.