For me, the AirAsia Asean pass has been difficult to use due to payment problems and limited routes. I was able to fix the issues with payment (no thanks to AirAsia customer service) but once I was ready to pay there were very limited routes. Many routes that were listed in the table of Asean pass routes on the AirAsia website were not available. I needed KL to Manila but there were no flights in all of April, May and June. I sent a tweet to @AskAirAsia and the next day the route was listed (only one flight very early in the morning, but better than nothing). Not sure if my tweet was what did it. I ended up writing a post on my travel blog about the problems I've had so far (and how to resolve some of them) at http://www.yourtravelpath.com/archives/479 . Still needing AirAsia to open up the route from Manila to Palawan. Fingers crossed!