Penelope was very organized and sent us full details of the place, and ideas for things to do with our kids, before we arrived. She greeted us and explained all we needed to know. The appartment is set back from the street and very peaceful, with space to sit outside in the (shared) courtyard. The place is spacious for Paris, and very well equipped. Children need to be supervised on the spiral staircase.
You're 5 mins walk from Bastille metro which links you to pretty much everywhere, or 5 mins from Gare de Lyon.
Overall highly recommended and a perfect host.