We loved staying at Jean-Marc's flat, it was warm and inviting and secure. The pull-out bed was very comfortable. The neighborhood is wonderful to walk to so many restaurants, the Marche des Enfants Rouges, and even a small park is lovely to have nearby.
We did have an issue on check-in due to an inadvertent mistake on our part, and the interaction with the manager was unpleasant. Despite our apologies, the level of vitriol directed at us from him was uncalled for. However, Jean-Marc was very responsive and helpful prior to our visit and we would still recommend the flat.