I really enjoyed staying at Eugénie's. The room has a comfortable bed and loads of storage, and you also have access to a good shared lounge, as well as the kitchen and bathroom of course.
The flat is ideally located for a real "vie de quartier", or for simply living the life in one of Paris's many villages. While happily at a remove from the main tourist hub, it is perfect for visiting Sacré Coeur and Montmartre's many other treasures, as well as for transport and getting around to any other area of Paris.
Over and above that, Eugénie is a very warm, cheerful and knowledgeable host, who is always ready to listen and stop for an exchange on affairs big or small.
I really recommend this place!