My husband and I thoroughly enjoyed our stay at this apartment managed by the very charming Nicole. She greeted us and allowed us to drop off our bags early (1pm). She also provided recommendations for nearby restaurants which we appreciated. The location cannot be beat. She is on the edge of the Marais, one block from the beautiful Place de Vosges. The apartment faces into the interior courtyard, so you do not hear any street noise.
It is also close to three metro stops -- therefore transportation to the airport (connecting at Gare du Nord) or to any major station is easy.
Highly recommended!