The location is fantastic, walking distance from some of the main places we wanted to visit: The Pantheon, Luxembourg Palace and gardens, Notre Dame, Pompidou center and meeting point for most tours.
I have to admit that entering the building I was a bit shocked as first, as the stairway is not depicted in the pictures shown and would have never imagined it being so gloomy. The apartment more than compensated this, of course. Its just a minor first impression that got me wondering if I had made a poor booking decision. Of course it wasn't. AT ALL.
Rene is very responsive to messages, the place was astonishingly clean, almost no noise at all can be heard from the streets (though the are quite busy) and temperature was always right inside the apartment.
Surely recommend this for anyone trying to make the most out of their stay in Paris!