Great artsy apartment in Paris. Close to three different metro lines that can take you anywhere in the city and beyond; there are many bars and restaurants in the area, and the neighborhood has a hip, artsy vibe -- a little rough around the edges but real. (Plus nearly everyone speaks English)
There is great natural light, as there are a few skylights and many windows.
As many people have said, the apartment is on the 6th floor and there is no elevator, so don't expect to go in and out of the apartment a lot in one day. (You can, but it's quite a hike up.)
All in all a great experience and would definitely return