Arsène's place is a 5 minute walk to the metro (CDG-etoile) where there are many main lines, and there is a supermarket open till midnight outside the apartment. Sephora and some fashion stores are just across the street. It is really convenient.
Arsène has been really helpful during our stay and he answered my questions through texts fast. We landed late and Arsène was there to greet us and showed us the amenities in the apartment, so we don't need to figure out stuff on our own. The bed is very comfortable and the apartment is huge for 2 to stay.
A few nice local restaurants in the neighborhood, too.
I highly recommend this place to travellers.