Jean-François apartment is great. It's in a cheap zone of Paris but very close to the metro and bus. It also has a lot of supermarkets and restaurants nearby. The bed is really comfy and it was very clean.
The main drawbacks are that it is a third floor with no lift and that the lady that welcomed us only speaks French so it was a bit difficult to communicate with her.
Overall a great experience and we'd definitely repeat at Jean-François' place