We stayed four nights in Corto's flat. It is very near to Notre Dame and in a lively area with lots of restaurants nearby. The room is directly under the rooftop. If you are looking for a modern accommodation you are wrong, but if you like this style its perfect. It was clean and we had all we needed. Best thing is the location. Only 3 minutes to RER B that brings you to the airport and also some other Metro lines.