Federica's apartment is nice and clean, very well located near to everything that you can just walk to Louvre, Norte Dame, place dauphine, etc.
Federaca is very nice and easy to communicate with, she and her husband live up stairs so the time check in and out is very flexible. We haven't meet her in person cause I made mistake about my arriving time but her husband waited for us the next day and told us a really nice place nearby.
I highly recommend Federica's apartment!