I've used AMEX travel several times, they often have decent deals on travel and promptly get the ticket from the airline. However, if you want to cancel within 24 hour, or make a change at a later date you can essentially forget it. The poor CSR's are not trained to do anything beyond what you can do yourself on the website, a cancellation within the 24 hour window takes an hour to accomplish. Changes later - forget it. If you can't do it from the website, they can't either, and if you contact the airline they can't help you because you bought the ticket from a third party. And this is Platinum service. You are always better off going directly to the airline.