My wife and I had a very good time staying at Françoise's apartment.
The apartment was very clean, which is a critical factor for us.
The location is excellent: it's very close to the metro (Bastille), and also to some bus lines. Some coffee shops, bakeries and restaurants are in walking distance from the apartment.
Communication was very good: we had a detailed correspondence before arriving. We used the auto translate implemented in Airbnb, and it was good enough. Please note that you should read the original (untranslated) text to get the correct entrance code.
The apartment itself was nicely equipped: from electricity adapters to more than basic kitchen accessories (see attached images, or try "a/Yd72mu5" in imgur).
It's worth mentioning that there's a nice, modern TV set in the living room. We didn't use it (it's Paris!), but it's impressive..
The building seems to be authentic, so I think that the host can't simply install an on-wall air conditioning system. Instead, there's a medium sized portable AC unit in the living room, and a small unit (a fan, maybe) in the bedroom. Perhaps this is the standard in Paris, I can't really tell. We didn't use it whatsoever, as the weather was perfect for us.
To wrap it up: it's a great apartment, a very clean one, perfectly located, and nicely equipped. The host is very nice. We would love to stay there again.