I can only recommend the stay at Françoise´s place! So comfortable for a group of 6-7 people. The flat is furnished in eclectic and authentic way, all clean, it is very pleasant to breakfast or dine (kitchen is smaller but fully equiped) with your family and friends sitting by the high French windows in spacious dining or living room literally 3 min. walking distance from Sacré Coeur.
It is perfectly fine walking distance to metro station or you can take the super fun Montmartobus riding the super narrow streets up the hill. Although I prefer to walk everywhere, therebis so much to see and admire :)