I stayed two months in the apartment. It is located in a vivid and safe area of Paris, full of bars and small restaurants. The apartment is quiet, clean and provides everything you need.
The bed consists of a fold-out couch, which can be pretty uncomfortable for a longer period of time. Sometimes I had trouble to shower because the water did not always drain properly. When I had problems with the flat, I often had to wait a long time for answers and contact the agency several times.
I would recommend the apartment rather for a short stay in Paris.