Laura's place is quite a great deal within Paris and Montmartre. Had no problems getting from Orly and actually benefited from its proximity to Sacré Coeur and its artsy neighborhood. The apartment is located in a one-of-a-kind complex with nice gardens. Neighbors are respectful and rather quiet. The studio itself is cozy, with enough amenities to have a comfortable stay (wifi, kitchenette, microwave, hot water).
While I didn't get to meet Laura in person (as this was during August) she stayed in touch with me since the day I made my reservation and, for my arrival, her brother Xavier helped me figure things out effortlessly. I thank them both for my short yet amazing time in Paris.
Note:I would only recommend future guests to use metro line 12 over line 4 (at least for me it always worked better).