Our family of five (three children under 15) spent 8 days in this great flat on Ile St Louis. Bit of a climb on a winding staircase to 4th floor but there is also a small lift (handy for racing the children to the door!).
Very peaceful location set back in courtyard with usually only the sounds of pigeons outside the large windows. Everything we needed was available in the apartment, good kitchen-ware, lots of hot water, good wifi connection, and Mathieu welcomed us to show us around and help with any queries.
Location is perfect with a view of Notre Dame right outside the door, the Latin Quarter and le Marais a few steps away over the beautiful bridges and boulangeries, grocery stores and ice-cream shops on next street.
We thoroughly enjoyed our stay, recommend having an evening picnic on the banks of the Seine at the tip of the island at Quai de Bourbon and the open air Friday night dancing on Quai St. Bernard!