Laurent's place was completely great. The location is amazing. We really fell in love with Belleville and you are right in the middle of things in his apartment - close to dozens of great restaurants, minutes from multiple grocery stores and easy subway (or Velib') access. Laurent even was kind enough to get us internet while we were staying, as he didn't have it when we arrived. So, not only did we then have internet but it was incredibly fast.
Communication with Laurent was easy and he bent over backwards to help make our stay smooth and comfortable as we were traveling with two young babies (twins). He managed to get us a crib, and even provided some extra baby clothes.
The apartment is bigger than it appears in the photos and while it is very centrally located, once you close the windows it is quiet and peaceful.