I stayed with the hosts' (Benoit) apartment for about 7 weeks. The apartment I was supposed to stay in was apparently flooded when I arrived so I was not able to stay there. But the Benoit arranged for an alternative apartment as a replacement. Initially I was rather concerned because I'd chosen the apartment specifically because of location (4th, close to RER B) and amenities. The alternative apartment was in the 8th (which I'd never stayed in). The alternative apartment was larger (I think), but was a bit further away from the RER B. Overall, the apartment worked for me and I managed to discover a new part of Paris (which I now really love). So my thanks to the host for arranging a very nice apartment in what seem to be a last minute calamity.