This apartment was one of our favorites for City Life on our three month expedition across Europe. It's incredibly well located.
It's so close to Louvre that we walked through the Louvre grounds daily, sometimes several times. The St Michel train station is also really close. St Michel trains go directly to a lot of places directly (no need to change trains) and so is very convenient, including to the airport and Versailles.
It has the small things it make it so much easier to comfortably stay in a new place. Basics such as cooking oil, salt and pepper.
It worked really well for a family of 4 because the living room curtains off and there is enough of a walkway to get through to the bedroom without even noticing our children in the living room.