We had a fantastic 10 day Christmas vacation in Lucie's flat.
This is a bright and beautiful apartment in a residential area near the International University Campus RER Train stop. - RER station Cité Universitaire. It's in "zone one" as are most all major tourist sites with Paris. Notre-Dame is 4 quick stops away. We used Chauffeur Privé (like Uber) with a discount code "google" for very affordable door to door service throughout the city.
The apartment is on the 10th floor and offers lots of privacy and beautiful views of the city including the Eiffel Tower in the distance. The kitchen is well stocked, has a dishwasher, a large refrigerator/freezer, but currently lacks a microwave which we would have enjoyed for restaurant leftovers.
The master bedroom has a closest which is converted into a spacious shower and sink combo. There's a bathroom in the hallway with a tub and a shower as well. (It would benefit from the addition of a shower curtain). We overlooked the fact that the only toilet is in what we would call a "powder room". We had assumed 3 bathrooms meant 3 toilets. It wasn't a problem for our family of 5 but it was a surprise to us.
We found it easy to shop in the neighborhood and found some fun nearby restaurants.