This is where you want to be. I have stayed in other areas of the city, and while they were beautiful ( 7th arrondissement), they were pretty dull after hours. Not so at Jeanne's. This location is in the heart of great Parisian nightlife. I stayed out all hours and never felt unsafe.
the apartment is a straight walk ( 2 minutes) to Center Pompidou in one direction, and into the old Jewish neighborhood in the other ( terrific food there on Rue de Rosiers - L'As Du Fallafel is a world-famous destination for great food on the cheap. There are plenty of markets and great restaurants within minutes of Jeanne's flat.
You are a short walk from the Hotel de Ville train station, where you can take the 1 train that travels to all the major destinations along the river ( Louvre, etc.) You can also walk to the Chatelet station and get a train going just about anywhere in the city. Many buses on Rue Rivoli also.This place is a fantastic spot to enjoy all of Paris.. I did not get to meet Jeanne in person, but her mom was there in case I needed anything and Jeanne was easily reachable by phone or text.
A word about the building. There is no elevator, and it is about 90 steps to climb to get to the apartment. I got used to the steps, but this may be an issue for you if you have any ailments or trouble with that sort of thing. That is the only issue I think you might want to be aware of.
The room is small but very cosy, and the apartment has ample amenities for cooking. laundering and Jeanne also has a large collection of maps and travel guides to make the most of your stay in Paris.