My family and I travel a lot and Jean-Yves is totally one of my favorite hosts to far!:) No other host I met was so eager to help and make you "feel" the city you visit. Top French songs from Jean we woke up to like every day just melted my music-loving heart:))
Place itself might be not all so shiny and modern, but for me that wasn't what I needed at all, cuz this helped it to be the only place you feel the country you are in not even going outside. You can't do this in "Ikea-like" places. Totally atmospheric flat! And location is just perfect. A nice calm place and still close to everything you might need - shops, metro and sights.
Really, really recommend it to anyone who wants to feel Paris to the core:)