We had a great stay in Edouard's apartment. It's a cozy studio (its exactly as the photos show), with everything you need for a good stay in Paris.
The apartment is not in one of the most tourist zones, with a metro station at 150 meters, which is awesome because you have connections to move to any place in Paris.
Something to note is that its in a 3rd floor, which with the high ceilings, makes it quite a ride upstairs.
The only thing that we disliked is that after the stores in the area close (around 8pm), a group of prostitutes seem to hang in the corner of the apartment and once we found one of them "servicing" her customer in the building's hallway (probably a neighbor accidentally left the building door open I'm sure this is not a common thing). Besides this, we never felt unsecure or anything like it.
Bottom line, its a good budget apartment, correctly located, with good transportation and close (by metro) to most tourist attractions with a friendly and communicative host.