Christian's place is right in the heart of Paris. Cannot beat the location right in Ile Saint Louis. We really enjoyed the local shops, especially Saint Louis Boulangerie. Amazing bread and pastries. The flat itself is in a very, and I mean very, old building. Character? 1000%. But be aware, the floor creaks. Not just a little. Took some getting used to. But overall, I'd say this is a terrific place to stay and enjoy historic Paris, a couple minutes' walk to Notre Dame, and lots of quintessential Paris right outside the door and around the corner.