Such a nice studio & an amazing host!
The subway station near the studio, Place d'Italie, connects metro 5,6&7, so it's really convenient to get to must-go places e.g. Eiffle Tower. It has a terrific view of the city as well. Olivier is kind enough to make your stay in Paris pleasurable; he provides you with cellphones, velib cards, a booklet about the place info and so on and on.
Put it simply, staying at his studio made our first visit to Paris a perfect experience.