Celine's apartment offered a great base for us while we were visiting Paris for four nights. The Marais neighbourhood is ideally located, full of cafés and bars and boutique shops. It is close to the metro, with the Arts et Métiers stop closest and Republique not far, which is only four stops from Gare du Nord. The apartment is cute and quite cosy for two people with large suitcases...but definitely manageable given we barely spent any time in our room. There is no longer a fold out bed as per the photos...it's now an actual bed which was really comfortable. We didn't meet Celine as she was on holidays, but the instructions she gave were all really clear and easy to follow. She was extremely responsive in the lead up to our trip, answering all our questions promptly and checked in with us during our stay.
I would recommend this apartment for a great stay in Paris!