I stayed at François-Xavier's place during an exchange semester. The place has everything you need for an extended stay. The area is very vivid and has a nice market close by. The neighbourhood can be loud at times, but overall I didn't encounter any issues from it. I mostly used the Metro Marx-Dormoy (Line 12) which is 5min walking from the apartment but other lines aren't too far away either (approx. 10min). All in all I can highly recommend François-Xavier's place.