I would highly recommend staying at Marine's apartment, located in the heart of the Bastille neighborhood. The apartment was a block from the metro, and within walking distance of many Paris attractions.
Marine was an amazing host. She replied quickly to my messages and was extremely flexible when my check-in and check-out times changed. She was a wonderful person to chat with in the evenings, and she went out of her way to help me plan out details of my days spent in Paris. I would highly recommend to anyone looking for a more authentic Parisian experience.