I did not meet Frédéric in person, but he was always quick in responding to my emails and questions. The check in process was very easy and the apartment was super clean and comfortable. It is located inside a courtyard, so there is no street traffic to keep you awake and being on the 2nd floor (US), relatively few steps to climb. It is also located quite centrally to shops, cafés and museums in the Marais, and short walks to public transport. I would recommend this spot!