My wife and I stayed at Pierre's for one week at December 13. The experience was absolutely great. The location is perfect - close to all you can wish (restaurants, museums, metro stations etc.). The apartment itself is equipped with all your gonna need for your vacation (kitchen, tv, music), and very quiet (it faces the building's yard).
Pierre met us when we got to the apartment and was very kind, pleasant and explained everything we needed to know.
We strongly recommend :)