I stayed at Frédéric's place for several days in February. It is a 1 bedroom apartment not far from Canal St. Martin and near Gare de l'Est. Although I didn't meet Frédéric in person, he was responsive and communicative and explained clearly how to get into the apt. I enjoyed my stay at his place which was perfect for my stay, especially the nice desk facing the courtyard. There are plenty of restaurants and shops nearby and public transport. Overall, a positive experience. I would stay there again.