Aurélien's apartment was perfect. It is as clean and nice as it looks on the pictures, and it actually felt bigger than we thought it would. The neighbourhood is not that interesting (and some parts are a bit sketchy), but we definitely never felt unsafe. The apartment is also located right next to two metro stations (Place des Fêtes & Pré St-Gervais), one of them being on metro line 11, which stops at some of the most important metro stations in Paris (République & Châtelet), and walking distance from the super fun Buttes Chaumont neighbourhood. Aurélien was easy to reach while we were staying at his place. The only negative thing is that the apartment might not be suitable for young children, since there are a lot of small objects in the apartment and the windows are quite dangerous for children.