Pierre's house is nice & welcoming and with everything you might need for your holiday . Montparnasse is a very convenient area to live in if you're gonna go around Paris. I personally walked everywhere. Plenty of bars and restaurants around and you also have Parc du Luxembourg which is very beautiful.
Pierre is such a nice &friendly person! As I booked in the day I arrived to Paris (I know..) he was very quick in responding to my request and he gave me some advices of where to go, what to see (the ones that weren't on my list) and where to eat!
Nothing to complain about. Great experience!