My partner and I had a fantastic weekend in Paris, which was facilitated by staying in Marais. It's a really cool area, with plenty of cafes, bars and restaurants. It's also easily walkable to Notre Dame and the Louvre. The Hotel de Ville Metro station is 5 min walk from the studio.
The studio was a great place to base ourselves for the weekend, with no noise from the nearby nightlife even though it was on the doorstep.
The studio is an size for two people, but probably no more than that. Virginie provided everything that we would need.