Our flights were delayed because of air traffic at Mexico airport. We arrived at the house at 11:45 pm, past the posted 3-9 pm time. The house does not have any automated way to enter. The host was angry and unkind, and decided to charge us US$26 for late arrival. Such charge wasn’t anywhere on their AirB&B posting. When we asked if there was filtered or bottled water, she responded drily that we could go and buy it at a supermarket. She did have a water dispenser with a large empty container. We don’t think that providing filtered water was her obligation, but it would have been nice to have it, since even locals in Mexico City don’t drink tap water themselves.