We booked our 1 week stay with Francois many months before our stay and he was very quick to respond to any of our queries including location of supermarkets and restaurants.
To us Montmarte is the real Paris. It is definitely eclectic with a mixture of everything Paris can dish up. After being to the D'orsay Museum we appreciated it even more because Montmarte is where most of the struggling artists lived.
There are three metro stations within walking distance and you can get anywhere on the metro literally within minutes.
We enjoyed the independence and security Francois' apartment afforded us and it was nice to come home after hours of sightseeing to our own little haven. PS...the washing machine was a definite plus.