I've stayed twice in Anna's lovely apartment, for 6 or 7 weeks each time. Anna's balcony is like a tiny jungle--with a clearing in the middle for a table you can eat dinner at with a friend--and her apartment nicely furnished and decorated. Good water pressure, plenty of hot water (and the water has lots of calcium, good for the bones!), a real kitchen, cross-ventilation keeps the air fresh, the internet connection is strong and stable and the street (where Descartes once lived) is quiet. It has an elementary school on it: if you don't like the sound of children playing games by day that might be a down side, but I love the sound. Besides, you're on the 5th floor (4e etage European) so it's a long way down--with echt Parisian views. The neighborhood is lively and convenient, including to the Bnf on bus 89. And Anna is the most helpful, friendly landlord I've had in years of renting places in France, or indeed Europe.