Zazie was an exceptional host. My wife and I stayed in Paris for four days and Zazie treated us like family! She met us at the apartment very late and have us a small tour of everything. The bed was comfy, room was big. The shower, like all places in Paris I think, is small but worked well. A very nice part about this place is that even though it is listed as a private room, it is down a long hallway to the dining room and even further from the hosts room so there is a lot of privacy.
After touring a few of the neighborhoods in Paris I think this might really be the best location! We booked it mainly to he close to the Louvre but it really feels like a "locals" hangout instead of the more touristy Le Marais (which is also worth a visit!). A really cool bar close by in Saint-Germain - café cassette with one of the nicest waiters we have ever met! - and a delicious pizza restaurant from Zazie's recommendation, Pizza Chic.
Zazie made breakfast for us every morning. My favorite part was the yogurt :) Everything was delicious! She is incredibly friendly. We felt like we got such a great experience just by simply being in her company and sharing stories with her - you can tell she loves her city but is so welcoming and eager to learn about other cultures. This is the way to experience Paris, from the ideal Parisian!