This is a great apartment -- it's in the (mostly) pedestrian-only Quartier Montorgueil, a half-block off of Rue Montorgueil (which is very busy), and yet the apartment itself is far enough back in the building that you get zero street noise. (It is in an apartment building so one night some neighbors were watching a movie with their windows open which was a little annoying, but other than that it was very quiet every day and night.) Laurent met is at check-in and was perfectly pleasant. The apartment is within "suitcase walking distance" of the Chatelet-Les Halles, Etienne Marcel, Sentier, and Reaumur Sebastapol stations.