Marie Agnes made sure we knew to contact Adela, the guardian, who was very helpful with getting us in and making sure we had all we needed.
The apartment was sweet, perfect size for the 4 of us--our two boys slept comfortably on the pull-out sofa in the living room. Had lots of lovely touches (like a towel warmer!) and all we needed for our short stay (3 nights) in the kitchen.
Great location--loved waking up and seeing the Seine out the front window--easily walkable to many sites and a convenient Metro nearby.