We spent 5 days in Sylvie's lovely apartment and felt right at home, a quiet space, comfortable bed and all the comforts you'd need. And you're right next to all the action in Montmartre and to so wonderful shops and cafes at rue des Martyrs. AND you're 15 minutes walk away from Gare du Nord. Perfect location.
We didn't meet Sylvie but her instructions were clear, the flat impeccably clean and communication flowing easily and effectively. And the bed is really comfortable. I would recommend it and come back.