Bus to KLIA from South

There is one way, by taking express bus. I never know this kind of service. When i think of going to KLIA or KLIA2 or LCCT (before KLIA2), either we drive, or we get a driver to send us. The cost of going to airport by paid driver is quite high, which should be more than RM800 from Kluang. So, what other choices do we have?

Recently only i know there is one bus express from jb which will take passengers to airport, and they stop at yong peng! This is good and cheap. The fare is only RM55 from Yong Peng. Good one, right? 

The website is www.yoyo.my. They allow online booking. You just need to print out the ticket which is very convenient.