Sleeping on the roofs of Paris was a delightful experience. The apartment is small, as usual in Paris, but comfortable and incredibly silent. The location is good, walking distance from the ile de la Cité, close to metro stations, supermarkets and restaurants. Nicolas has been very flexible on check-in and check-out times, making significantly easier the organization of our trip in Paris, like in a 4 star hotel with 24h receptionist!