This is a great size for two people or a small family. It was very clean. Margaux responds quickly with any help
Or questions. The bedroom and living area are decent size and the toilet is separate from the bathroom so people have access while others shower. It’s comfortable enough and is 5 min walk from Metro line 12. You can easily take that to Sacre Coure or Moulin Rouge area and also use the line to access stations to change to other lines for the center. The metro is quick and easy. About 30 minutes with changes to center of Paris.
We bought a Navi card ( one time fee of 5 euro for the card and 22.30 for a week of use) and was able to use metro, scnf , and busses. We used it to get to Disneyland in only 1 hour from Montmartre with changes etc. make sure to put your name and photo on the Navi card ( bring a passport photo or you’ll pay 5 euro at a photo booth in the train station) or you’ll get fined. Don’t bother buying if your there under 5 days as individual tickets may be cheaper.
WiFi in Montmartre is not great and would go off nightly making it really hard to email or stream anything. Sometimes it was off only short time but one night was off all night even the next morning. I hear that WiFi in general in this area will be difficult.