Was locked out of the Airbnb after following all the check in instructions (it seemed to be locked from the inside, the key code could not open the door). VERY stressful to get a last minute Airbnb in a foreign country and travel to the new location. After I sent Massimo a video proving that I could not get into the apartment with the correct key code, he said he could not help me since he was out of the city at the time.