I stayed with Isabelle for 8 days while I was in Paris, and I loved my stay there.
Communication up until I arrived was very thorough, and also during my stay.
Unfortunately I got sick so I spent a lot of time in the apartment instead of sightseeing, but Isabelle didn't mind at all. She even made me soup to make me feel better!
The apartment is not far at all from the centre of Paris, and very close to all public transport, cafes and shops.
I really enjoyed my stay here, and would definitely recommend this place!