we will be visiting HK and staying in The Kowloon Hotel from 18 to 28 Feb 2011, please advise: best travel cards to get, can it be purchased at the airport and used to travel to The Kowloon Hotel and return to airport by bus. Is the N21 bus correct? If this is not correct what is the most economical way to travel airport/hotel return and have ability to travel MTR, bus to say Stanley market, Star ferry etc, your advise is appreciated