EPIRB
Add to that lounges (that's where you get breakfast for a 6:10 departure when you live in Murrumbateman!).
Seatsize is also an issue, I need to work while I travel.
I tried Rex once, got stuffed around at check-in in Melb and had to sit in a plastic seat. I think I saved a whole $12!!!
It ain't worth it, rather than whinging they need to provide a service people doing a 16 hour day CBR-MEL-CBR will chose to buy.
AK