Fantastic location, though on Saturday night there was a very loud party with music etc until 4/5am, nothing that kept us awake. Area is perfect for exploring the Marais area.
Apartment was fine, rooms very small but it is central Paris. Beds comfortable, shower good. Kitchen well equipped. The place felt a bit sterile as everything was white!
Book if you want a good value apartment to use as a base to go around the city- but not if you want to have a bottle of wine or breakfast and escape the city for a while.