My wife, daughter and I had a great six-night stay at Jean-Francois's apartment. The apartment is well-located in the 11th arr. (kind of reminded me of Brooklyn's Park Slope neighborhood). Easy access to two Metro lines to get you anywhere you wanted to go in Paris, plus there were plenty of cafes, restaurants, patisseries, grocers, etc. within a few minutes walk if you didn't want to leave the neighborhood.
The apartment itself is reasonably spacious, clean and comfortable. with a full kitchen and a washer/dryer combo. The weather was pretty mild when we were there, but I think the apartment might get uncomfortably hot during a heat wave. Overall, we were very comfortable in the apartment and had a great stay.
Jean-Francois was an excellent host - lots of communication beforehand to make sure that we knew exactly how to get to the apartment and how to get in. He graciously accommodated our early check-in request. He also thoughtfully leaves a packet of information in the apartment with transit instructions and neighborhood information.