On the Airbnb website, it says check in anytime after 3PM. We originally were supposed to arrive at 3, but had many flight complications and were not able to let the host know due to not having good service in Italy/being on the plane. We were bombarded with texts and voice messages from the host yelling at us, which was not pleasant. We did not know we were supposed to arrive right at 3 and do not think the bombarding/yelling was appropriate. Also the shower completely flooded and leaked all over the floor every time we showered - however I’m sure this can be fixed! On the other hand, the apartment was in a wonderful location in the old town, the roof was fantastic, and there is even a small balcony in the room which was a great surprise!