I had a great experience at Alexis' Montmartre flat. It's right in the thick of the restaurants and shops on the wonderful Rue des Martyrs, but it's still extremely quiet at night inside the apartment. There are plenty of places to sit and hang out as well as an extremely comfortable bed (not a sofa bed like many other Paris studios on Airbnb!). Alexis was a great host -- welcoming, communicative and flexible with my arrival and departure times. He also left plenty of snacks, bottled water, and breakfast food/ingredients. I would definitely stay at his flat again and highly recommend it to others interested in this neighborhood.