The place is not really facing Notre Dame - it's better - it's between Notre Dame and Louvre. 2 train stations and RER close by. Supermarket is very close. I think the place needs a major cleanup.
Be prepared - one day we decided to cook in the afternoon - received a letter from a neighbor that we were too loud (it was 2 in the afternoon).
But the location is just perfect, could not be any better, I would stay there for the location only.