Right next to Gare Montparnasse and connected Montparnasse metro. Simply market is near. I could recognize the apartment from the top of Notre-dame church and even from Montmartre hill as it is one of the grand building near the Montparnasse observation tower.
House is like ordinary home with all the utensils and facility. Washing machine and drying machine separated which I liked about^^ A family seems to live here when there are no guests.
Our family stayed without difficulty.
Thank you!