Catherine's apartment is nice, cozy and clean and located conveniently very close to a subway station where 3 lines intersect.
Climbing the 5 floors can be a bit challenging if you're not in a good shape, but that is a common thing in Paris in such apartment buildings.
It was a pleasure to find bookshelves filled with great books in both English and French and I also loved how the rooms were decorated with little stylish touches.
I would definitely stay here again!