Justin’s apartment is in a very good location and it has everything that you need. There are many metro station around the apartment and they are main lines so you don’t need to do transfer between lines most of the time even to outside of the city(Disneyland, Orly Airport). Check-in and check-out are really easy and don’t take your time which is a big advantage for a short trip. And also Justin is a good host who is very responsive and helpful.