Martine is a good host. She was constantly in touch and sent out address information at regular intervals.
The location of the apartment is quite awesome. 2 mins walk from the Paris Montparnasse station. And the apartment gives you a really good panoramic view of the city since its on the 15th floor. One of its kind to be honest.
However a few downsides include, the really dirty kitchen and badly maintained toilet(stained all over). If you like making your coffee or getting some hot water for yourself, you might really not want to stay here.