I loved my stay at Aurélien's place, it was exactly as described. The apartment is comfortable, convenient, and spacious for Paris. Really great shower. Didn't get to meet Aurélien but there was no problem communicating.
The 20th/Gambetta neighborhood is one of my favorites in Paris, it's a real Parisian rather than touristy neighborhood (but keep in mind that line 3 is not as convenient to access all the central/touristy parts of Paris, as, say, line 1).
Merci Aurélien pour un séjour très agréable!