Mehdi is a great host; super communicative and he was flexible in letting us store our luggage longer. His flat is well decorated; bed is comfy, nice shower... it's Paris so the flat is small, but space has been optimized to the max.
The thing that knocked off a star is that there's no view what so ever (except neighboring flats) and because of the high building you cannot see the sky. Therefore you don't know which kind of weather it is and there's limited light. This didn't really stimulate us to hang out here during the day.
Additionally you can hair the upstairs neighbor walk around (until 12am) quite well.