We had a lovely 3-night stay in Emmanuelle's flat. It is in a great, central location, but was very quiet. The Latin Quarter is on the doorstep, Le Marais district across the Seine is 20 minutes walk away, the Louvre about 25-30 minutes. It was only 2 stops on RER B from Gare Du Nord & the Eurostar. We ate at a couple of restaurants nearby, and the boulangerie / patisserie at the end of the round was great.
Emmanuelle gave us clear instructions for getting into the flat, and answered quickly when we had a query during our stay. Great!