We enjoyed staying at Pierres apartment, which was exactly as described on the website. He made sure that we knew all the necessary practicalities about the place and also gave good suggestions on what to see, where to eat , etc.
It was not our first time in Paris but it was the first time we stayed in the Montparnasse area and it turned out to be nice and interesting and certainly more calm than other parts of central Paris.
We would certainly recommend his place to anyone visiting Paris.