I mastered the metro and Nathalie's place is off of 2 lines M2 and M11 which takes you close to the major attractions within 20-30 min depending on your area of interest. It is close to Marais, Hotel De Ville, Arte des Meteirs and Louve. It was nice to have a place to come back to at night after a day of exploring the city. The place is stylish, very clean and just as I had imagined.