The apartment and our experience was amazing!
Thierry is a great host, he met us in person, welcomed with fruits and a very tasty cake and showed around the apartment. Then he contacted us later and asked if we needed a fan (which was super-nice and also perfect timing question, because it was getting really hot in Paris).
The apartment itself is small and stylish, it is located in very peaceful place (no bars, no crowds, no noise), the windows are looking into the inner yard. And everything you might want to access is a walking distance, coffee shops, cafes and restaurants are 5-10 min. Pompadour Center is 15 minutes away if your pace is slow.