I picked the apartment purely for it's location and it was perfect for us. Metro from Gare du Nord took us to Saint Marcel in less than 20 mins. The apartment is only a couple of minutes away from the station. Please do be aware it's on the 4th floor for people with mobility issues or asthma, like my friend, it's a bit of a climb up the stairs. They are steep. The flat is very conveniently location. 2 metro stops very close bye, shops, cafes and bars. Walking distance to st Germaine and Bastille. If you do not mind walking, you can get everywhere on foot. It was extremely hot in Paris the weekend we stayed - something we did not consider when picking the apartment, there was an electric fan/aircon available which helped. All in all a very excellent and seamless experience.