When my friend and I booked to stay at the apartment, I was in constant contact with Céline before and during our stay. We didn't get to meet her but we contacted each other just in case there was any information we needed.
I would highly recommend her apartment as it is very close to Gare du Nord and other neighbouring metro stations. There are lots of cafes, bars, restaurants and supermarkets and close to the Sacre Coeur.
We only had access to the bedrooms and bathroom, but Céline provided us with an assortment of teas and coffees. The bedrooms were comfortable and bathroom clean.
Finally, I would recommend Céline's apartment based on how affordable it was for me and my friend.
Thank you again Céline for making our stay an enjoyable experience :)