We didn't meet the hosts personally, but their friend Michael showed us the appartement, explained us everything and was really friendly and helpful.
Even our question if we could leave our luggage in the appartement a bit longer than the Check-Out was, was answered immediately and there was no problem.
The appartement was super nice, clean, with comfy beds. It was very close to the metro stations and also just a 5 minutes walk away from the Louvre.
We really enjoyed our trip and we would always come back to the appartement for another trip to Paris.