I stayed at the apartment for around 3 months and really enjoyed my stay there. It was very clean when I arrived and quiet considering the rather busy neighborhood. The location of the apartment is great, you can find a supermarket right on the other side of the road and Metro station Montparnasse can be reached in around 5 minutes by foot (with 4 metro lines available). Furthermore, the food market taking place every Wednesday and Saturday on Boulevard Edgar Quinet (2 minutes from the place) is absolutely gorgeous! I can also definitely recommend Anne-Christine herself, she was a super helpful host and responded quickly whenever I needed something. Her tips always solved any problem I had :)
If there is anything I could criticize, it would be that the kitchen was rather simply equipped and that the apartment misses something to hang coats on. Besides that, I would always book it again!