I'm heading to Hong Kong and have always purchased an Octopus Card on prior visits due to the convenience it brings.
However, I do not recall if one can purchase the Octopus Card with a credit card. Does anyone know? I will also be purchasing an airport express ticket at the airport upon arrival.
Also, for returning the Octopus Card does anyone know how late the service centers are staffed to return the card at the airport (or at the airport express station in Kowloon)? I happen to have a very late evening flight for my departure.