My girlfriend and I had a great 1-night stay in Catherine's apartment. Perfect location, very central, very convenient to go to/come from the airport, metro station a few min away by walk.
The apartment in itself is nicely decorated with Catherine's personal touch.
Last, even if we didn't meet Catherine for check-in, she made sure to answer all our questions in a matter of minutes by phone, even the silliest ones, whenever we needed something.
If you're looking for a cosy, romantic stay in Paris, this apartment is a great choice.