The apartment is in the 6th arrondissement, in a lively street with cafes, shops and about 100m from the metro, but very quiet in a building in the backyard. Fully equipped kitchen, great wireless connection, and the location make it great for short or long-term stays. Fernande is super-responsive (though I haven't met her in person) and a great host. The description and pictures are absolutely accurate and I can only recommend staying in this apartment.
P.S. for all coffee-lovers: there's no coffee/espresso machine, so if you cannot exist without a decent cup in the morning (like me), make sure to bring one :-)