The apartment is in a great location, few minutes walking from Pantheon and Notre Dame. It also has a very good vibe being a University area with a lot of nice little restaurants and bars at good price.
The apartment is perfect for a couple and it is very very warm.
However, it gets very noisy during the evening/nights (we spent there a long weekend) as the apartment sits just on top of two night bars for students. It would have been impossible to sleep without ear plugs.
Overall, despite the noise during the night and the poor/lack of communication with Maxime, we had a very good experience and we had the chance to fully enjoy our first experience in Paris.