I love Indigo. They are LCC, sure, but they are also super flexible with excellent customer service - different from the previous LCC model where they seem to be angry at their customers at all times. They have taken a huge amount of business away from the full service carriers to the extent that Jet Airways collapsed (and I would guess others during COVID-19, although I haven't been following Indian aviation recently). They are operating in a different market that is more price conscious than Australian business, but what that means is that if you do have a bit more cash, you can upgrade yourself with their various perks and get equivalent to full service with some elite-like benefits (seat choice, priority baggage, priority check-in, extra baggage allowances, etc). Only thing they don't have is a lounge but I could see that as an easy add-on in Australia given how popular they are. They also do not have business/first class but I really think that is unnecessary for the Australian east coast market (in reality), where it may be more problematic is Perth/Darwin services.