All together this is a great appartement. Easily accessible using the metro, and only a couple of stations from the city center. In the close proximity there are several supermarkets and boulangeries/patisseries and very good local restaurants. We stayed for a total of 5 nights and dined every night at a different place and all were superb.
The apartment faces the courtyard so it's really quiet during the nights.
Only downside, which was already stated by the owner was that the apartment is on the 4th floor without lift and a rather narrow staircase, which however is usual for Parisien standards.
Very clean apartment, with all necessary devices like washing machine and stove/fridge.
5/5 stars and would love to come again!