Location of this Airbnb was spot on. Conveniently located just down the street from Metro 8. Plenty of shops for food items on the same street as the unit. We especially appreciated the fruit and veggie market at the end of the street. The unit was as described. Just be prepared to bring luggage up 2 full floors of spiral staircase. Security locks on two doors to the street was nice and made us feel very secure.

Get a Navigo Decouverte card at a Metro station, not Gare Du Nord or Airport where lines can be 50 people long. Bring a thumb size photo, mailing stamp size, to place into the Navigo Decouverte card. Then purchase a weekly pass ($22.80) that can be used starting Monday through to Sunday on all metro and trains. Can be used on train to Versailles too. You can also purchase "one day ride all day" metro pass ($7.50) that is applied to the Navigo Card. Instead of using little paper tickets, just tap the card at the metro turnstiles. Just don't lose it! And don't tap twice at one stop or it stop you from entering metro. Sometimes you can't hear the beep, but it works. Just go through!
Note, the train station at Notre Dame is closed for repairs/reconstruction. We did not see any signs saying so.
Also, we expected the B Train into Paris from airport to be available but found it closed starting at the airport. Had to take a bus to the next available open B line station. Highly recommend taking a taxi from the airport to the Airbnb unit.