I recently had the pleasure of using the Metrolink System in Adelaide and was surprised at its cheapness and cleanliness, however the weird diesel train on the weekend was perplexing.
Didn't have fare, bus drivers never seemed to care whereas in Brissy they think they are the Gestapo.
I could travel basically as far as i want for 1 flat rate, in Brissy an equivalent travel distance would cost me about $15 each way.
Didn't see any ticket inspectors for the week.
The free city loop buses and free tram stops actually go places of use, here in Brissy they do a shitty small loop and do not go into the Valley.
The ONLY annoying this was being unable to see a real time card balance on the login page, hence why sometimes i was greeted with the sound of shame.
Bravo Adelaide, now if you could only do something about all of the Goths and drunks in the CBD walking into traffic and the state of Marion Road that would be tops.
Also probably cheapest airport-city route in Australia during off-peak at $2.20 or $3.95 peak with a metroCARD.