I use Air Asia a lot and I've used Jetstar once to get to Jakarta from Bangkok. Jetstar actually cancelled part of my return leg back to Bangkok (no warning and no explanation) and I had to wait 5 extra hours in Changi to catch the next flight. No info at Changi either... nothing on the departure boards and the info desk just shrugged and said "it's a budget airline", as if that's an explanation. Luckily Changi must be the best airport in the world so I managed to occupy myself with the free internet, a swim in the pool and a trip to the hairdresser.

Air Asia is better than Jetstar (and far better than European budget airlines) IMO as far as customer service is concerned... at least you get polite and smiling air hostesses!

There are delays with Air Asia but I've never had a flight cancelled with them. There is no seat allocation so you may not get seats with the people you're travelling with. The plans are newish though and the seats are leather. I'd go for it. Check the baggage allowance though. I've never been charged for excess baggage but I've seen reports of people who have.

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“Not all those who wander are lost.” Tolkien.
Life is not measured by the number of breaths we take, but by the moments that take our breath away.