We stayed 1 night instead of 5 because of a bathroom problem but Rui was very honest and cancelled the reservation because of the problems and contacted Airbnb to help us to find an other place. He is very nice and it was really kind to wait us in the middle of the night to give us the keys.
Nevertheless, we were not disappointed that the reservation was cancelled because the flat is very noisy and does not have a real window (only a window in the door) so it was a bit dark.