The apartement itself is really great and perfect for two people staying a few days in Paris. It's nice to have second room - even tough the sleeping room has no door towards the living room/kitchen. Note, that it's not possibe to close the bathroom door as well. Christophe wasn't there for check in but he was available for questions during our stay. The house is perfectly located and everything is easy to reach - by foot or metro. In the night it was quiet and we felt safe in the area.
Unfortunately there is no ventilation in the bathrom and obviously therefore there is black mold all over the walls. To be honest, we felt very uncomfortable to stay in the bathroom.. Additionally there is a bad smell due to the mold and most probably the canalisation. In the kitchen was the bad smell too, but this may be a Parisian problem. We had to keep the window in the living room open at all the time so it got a little cold.
We really hope that Christophe manages this problem soon, so that the health of future guests is guaranteed ;) if this is solved, we would definitely recommend the apartement!!