Élodie's place is well located in Rochechouart area, about 5-7mins walk to two nearby metro stations (Anvers or Barbès - Rochechouart). Her place is at the junction so it is easy to locate. You will need to be prepared to take multiple trips if you are going to her apartment as her unit is the topmost floor via a very small lift (common in Paris).
Plus point is that her refrigerator and cupboards are fully stocked with food and drinks! This is absolute great as we did not have to bother to find breakfast (if you are okay with simple bread and spreads).
Will recommend!