Celia's apartment is in a great neighborhood and location for visiting Paris. Easy walk to all the museums and sites. The night life near the apartment is great so if you are interested in going out there is no lack of places to hang out at. Though it's very active outside, you would not even notice when inside the apartment.
I came here with my mom and slept on the couch for the week and had no issues. I would highly recommend this apartment, next time I come to Paris, hopefully this apartment is still available.