I never had the pleasure of meeting Brice personally, but when ever I had a question in advance he tried to help by replying quickly.
The apartment is in a very multi-cultural, lively neighborhood and in walking distance to Sacré Coeur and the metro. I loved coming home to my little shoe box - because the apartment isn't much bigger than that, but has all the amenities you need - opening the window, just sitting there and enjoyed watching everything that was going on below.
If you want an authentic place to stay in the middle of Paris this is it. I would stay there again at anytime.