We really enjoyed staying at Cecile's place. It was more than sufficient space for our 4 member family. Cecile provided us a bottle of sparkling wine when we arrived - which was a very nice touch. She provided a very detailed book explaining how to use everything in the apartment, as well as where everything was in the immediate neighborhood.
The apartment is ideally located. It is one block from an unbelievable street market that we shopped at every day. Fresh bread, butchered meat, and a very convenient food store - plus great desserts made daily.
It is also in close proximity to all of the major tourist sites. Very easy walk to the Arc. The metro stop is directly across the street that gets you nearly anywhere you want to go. The train station that brings you to Versailles is about 5 blocks away - very convenient.
Overall, great experience. I would highly recommend Cecile's apartment.