We had a great stay at Denis's apartment. It was really well connected, being only 5 mins walk from Nation Metro which has good Metro and RER links (easy to get there from CDG). The apartment is a really good size (we were a family of 4), plenty of space and two loos which was handy! The check in was really easy with great communication including from Denis's friend who let us in as Denis was out of town. Well recommended!