We enjoyed our stay at Julien's place so so much! He answered all the quostion that we had and was so helpful. Extra thanks to Julien's mum, he was very kind and friendly :)
Actually, the apartment in general looks even better in real life than in pictures. The neighbourhood is not unsafe/dangerous at all. Don't worry about walking nearby when it's dark.
Just 20min by metro and you are standing in the heart of Paris.
I highly recommend Julien's place to everyone, I have only positive thoughts!