We spent a weekend in Charles' lovely apartment in Montmartre. Unfortunately we couldn't meet him in person, but his friend Charlotte was waiting for us and explained us everything enthusiastically. The apartment is cosy and more then big enough for two. We loved the maps and tips that Charles wrote down for us, and liked the chicken and the cat in the courtyard. The bed was a bit hard, but good. The neighborhood is also great and easy to get to. You can walk to gare du Nord, to the sacré coeur and to the market of Clignancourt. I would recommend this apartment!