Unfortunately we had to cancel our booking with Elodie an hour after our arrival, because of the broken air conditioning. Elodie was really nice and readily available for us, but this problem was not solvable, depsite her giving us quite a few instructions to try and fix the air con.
When we booked our trip air conditiong was absolutely necessary for us, and we were proved to be right because the days we spent in Paris were really hot. It would have been unbearable to stay in Elodie's place with those temperature and without air con, especially because the place is basically a big room, with an enormous window as a wall, so very easily prone to get hot. Plus there isn't any kind of ventilation system in the bathroom, so heat and steam from showers and hair dryer would have inevitably made the place even hotter.
We can give only two stars because despite Elodie being extremely kind, we actually lost quite a lot of money cancelling the place and we were basically forced to look for somewhere else to stay last minute and spend even more money.
With all of this said, the place looked nice, clean, well equipped and really well situated in the city (it was about a 5 min walk to the closest metro station). For a winter/autumn/spring trip we would definitely recommend this place.