10 stars--5 for the apartment and 5 for Barbara! I know this area very well having lived not far away from Barbara's apartment for five years. The apartment could not be in a better location. The apartment is within short walking distance to anywhere in the 6 arrondissement (Jardin du Luxembourg, Le Sorbonne, Cafe Flore and Cafe des deux Magots, Le Bon Marche, etc). Walk in the opposite direction you are at the Louvre and Notre Dame. Also (and very important in Paris) is that the apartment is on a quiet street away from the late night bars that would spoil your sleep. Barbara is an extremely gracious host. I was in Paris visiting with my daughter for just a few days and without any hesitation she allowed us early access to her apartment following a 6:30 am arrival at CGD airport. The apartment itself is high-end modern, airy and comfortable. The building's and apartment's security was top notch. I had absolutely no concerns for my daughter coming and going on her own. Electronic front door codes and electronic key, second entry door with electronic key, elevator with another electronic key to activate floor buttons, camera surveillance, and finally secure apartment door itself--and all this is a safe area to start with!
Bottom line: I previously lived close to Barbara's apartment (physician doing research at the Pasteur Institute at the time), know the area intimately, and the next time I am visiting Paris would look forward to staying at this apartment again.