Christian and Chlotide's flat is wonderful. It's walking distance to Sacre Coeur and everything else Montmontre has to offer. They own a wonderful cheese shop across the street and their associate gave us several cheeses and a bottle of wine when we arrived. So lovely! Just make sure you are prepared to make the hard climb of 93 spiral steps to get there.
A comfortable bed, cosy living area, easy to cook in kitchen and three sets of French doors opening up to the balcony with a view make the climb worth it.
I would happily make this my home base in Paris again.