I stayed in Cyril's apartment for five nights in August, to visit Paris with my husband and our 14 year old daughter. It was the perfect place: beautiful building, really quiet at night, clear (a fourth floor, with big windows), central and within walking distance of many sites (Invalides, Musée d'Orsay, Musée Rodin). The Métro stop (Invalides) is also very close. It is a very smart area (embassies, government buildings) with elegant (and expensive) shops and restaurants, but it is also packed with nice bistros and brasseries. Rue de Bourgogne also has some nice groceries shops. Everything in the apartment worked just fine: all the appliances are new and well kept. Cyril greeted us upon arrival: he gave us the keys and showed us around; he also gave us precious information about the neighborhood.
To sum up, I certainly and warmly recommend it to anyone who would want to make the most of their time in Paris.