The apartment is exactly as depicted in the pictures. Very nice decorated and clean. If anything, the shower area turned out to be a bit bigger than it looks in the photos. You don't need keys for anything, as everything works with automatic locks and number codes.
It is very well conected to Paris with a metro stop for the line 5, that allows you to change to pretty much anywhere else. You can also have a nice walk of around 25-30 mins to Notre Dame.
You have some nice restaurants around too and a Carrefour express just turning a corner.
The parking place is great. A private garage with videocamera surveillance to leave the car there a forget about it.
The only thing I would mark as a downside was the internet conexion. Staying there we reached to the conclusion that the modem was on the apartment next door and the conexion was most likely shared between the two, which caused some issues for us.