My goddaughter and I had a wonderful stay in Claudine's studio.
The apartment is comfortable, well equipped and well located (next to the Jardin des Plantes with direct metro from/to Gare du Nord). There are a few good restaurants closeby (like Sellae) as well as a supermarket.
The communication with Claudine was easy and clear. She was also very responsive and flexible with our requests.
We definitely recommend Claudine's studio to anyone visiting Paris.