I just stay 2 night at the apartment with Olivier and Mathieu, everything was fine. The area was great, just in the middle of the Marais and near from a lot of some tourists attractions..also just a few steps away from the Metrostation: Hotel de ville. The room was very cosy and clean. Both guys are very friendly but also busy with work so I just have seen them rarely, but with Mathieu I had a nice conversation:-)