We had a very nice stay In Alexandre's amazing apartment right in the heart of Montmartre. Even though the apartment is on a busy tourist street, it is very quiet: we had a good sleep in a very comfortable bed. Also great views from the big windows!
Close to Abbesses and Lamarc-Caulaincourt metro stations, but be prepared to climbe up several steps when returning to the hill.
Alexandre was very kind and easy to reach when ever needed.