Great Place! The location of the apt is perfect, just in the middle of the Marais, 1 minute from the Centre Pompidou and 5 minutes from "Les Halles". The flat is exactly as described: cozy, even if there is no elevator to reach the apt and even if you have literally to climb to reach the upper level, but this is part of the experience and contributes to the great parissienne atmosphere.
We didn't meet Louise but her personality was well carried by many lovely details.
Well recommended...obviously!