Isabelle’s apartment is lovely and comfortable. Many nice cafes and stores are close by. Very walkable - bus stops and metro very close, as well as trains. Isabelle helped us get a ride to Gare du Nord early in the morning and answered our questions very quickly.
We were a 15 minute walk to Notre-Dame and another 10 minutes to the Louvre, a pretty walk along the Seine.
Both regular bed and sofa bed were very comfortable, and we slept well. The apartment was just cleaned, and we appreciated the hot water pot, tea and the washer / dryer, especially since this was our 3rd stop on a multi-city trip. The map and info on Paris was also helpful.
The internet was reliable - very important since we were planning around weather and the transit issue.
I definitely recommend Isabelle’s apartment for a stay in Paris!