I don't know which I loved more -- Christina or Christina's beautiful studio!
Christina is an amazing host. She was responsive AND proactive, as she reached out to me about two weeks before my reservation to make sure I knew how to get from CDG to her apartment (def use the metro -- it's an easy and affordable option, and the apt is near the Passy station). Her check-in photos were super helpful and made navigating to the unit straight-forward.
The stairs are definitely not for the faint of heart (I think there are 142). However, the view from the tiny balcony is totally worth it. The balcony also has a table and chair for you to enjoy your morning coffee.
I only had a one-night stay during a 23-hour layover in Paris, but Christina's small space was perfect for my needs. The apartment is one small room with the shower and toilet in the same sleeping area. Therefore, I'd only stay again if it was another solo trip; I'm much too bashful to use the toilet/shower in front of anyone haha