Our stay at Charles' place was delightful. Their apartment is nicely decorated, and you can feel that they live there (as opposed to all these places used just for renting on Airbnb). Charles was extremely responsive and flexible; he waited for us to give us the keys even though we arrived quite late, and allowed us to leave our bags after the checkout time. This made our stay really pleasant. The location of the apartment is also amazing; a few-minute walk away from the lively neighbourhood of the canals, and only a 15 minute-walk away from the Gare du Nord and Gare de l'Est.
Great place overall, highly recommend!