Virtually my only complaint with AirAsia is that it doesn't seem possible to book connecting flights between the different companies that make up AirAsia ie AirAsia Berhad, AirAsia Indonesia, AirAsia Thailand etc.
I wanted to travel from Makassar Indonesia to Hong Kong which involves AA Berhad & AA Indonesia..The connection time in KL for flights is quite close and because I can't "transit" i have to go in & out of Malaysian Immigration... There are only 4 flights a week from Makassar to KL & it was a stress filled time at KL airport.... I just made the HK flight but because of the uncertainty I couldn't make ongoing bookings until I arrived in HK.
It would be good if the different branches of AirAsia communicated with each other...... I am quite happy with AirAsia otherwise... except for the paper towels in the toilet!! They are just tissues & fall apart..