I'm travelling to the Maldives and have looked at a few options to get there. I've narrowed it down to Sri Lankan airlines which is the cheapest I can find but never flown before. I have also looked at Etihad and Singapore airlines which I have flown before but are around $400 more expensive. What is it like going on a budget airline and what is the difference between the more recognisable airlines? Is it worth paying an extra $400?