Camille was helpful from the very start, with plenty of local recommendations. The flat itself was exactly as described, and was found in a very clean and tidy state. (My girlfriend informs me the interior design was "tasteful" and "beautiful". I am a philistine, so I shall remain quiet.) Location was perfect, with Sacre Coeur mere minutes away. The 6 floors of cardio certainly lessened our guilt while stuffing ourselves with food at the bakeries!
Overall, a fantastic place to stay in Paris. It felt, and probably was, quite an authentic experience of living in Paris. Would certainly return!