Nathalie's neighbor let us in since Nathalie was on vacation. This property is normally occupied by Nathalie and her family, so it is fully furnished, not the usual bare-bones rental. It was helpful that she provided 2 keys, and lists of good neighborhood restaurants and other suggestions. It was nice to have the use of a good washing machine.
The flat is 2 flights up the stairs, which is fine unless a prospective tenant can't do steps. The metro station Chateau d'Eau is only 2 blocks away. The only slight objection is that some of the apparently unemployed young men of the 'hood have nothing better to do but lurk around the metro stairways and throw trash all over the place.
The security at the flat is good, however, and the interior courtyard has a caretaker that keeps it lovely.