The communication with the host during our stay was really a nightmare. Two hours lost for picking up the keys, going from a supermarket to another shop for getting them. When we picked up them the keys did not open the main door at the street, no answer when we phoned the host, nobody in person came to help us, just messages from time to time. The same problem when we leaved the flat, even when we tryed the day before to avoid this problem writting the owner (as we had to take a transport out from Paris and with the time really tight) offering him to leave the keys in a more secure point we received no alternative. Another two hours lost for dropping off the keys. Thanks to AirBnB customer service for their help both days. A nightmare.