Door to the building is locked during early hours of the day, so don’t check out by leaving the keys in the unit as instructed by one of the check out options provided by Airbnb/hosts (i.e. you’ll be locked inside the building, which was what happened to me). Hosts unresponsive for 3 hours. Needed to knock on neighbouring units’ doors to be let out of building. Neighbour didn’t seem too pleased - can’t imagine why…