It is also the only way you can get from Melbourne to Adelaide travelling during the day. The Brisbane metropolitan and interurban system is a good one, although admittedly I haven't travelled on it much. It does look reasonably effecient, and works on a principle similar to Sydney, but without the loops. The Queensland system is the best regional service in the country, although the state has one big advantage. Most of the population is located on the coast.
Several trains run the long distance from Brisbane in the south of the state to several locations.
The Sunlander and the Queenslander run the full trip from Brisbane to Cairns. The Queenslander is the more expensive and luxurious of the two, and is the third most luxurious train in the country. The Queenslander runs once a week, the Sunlander three times a week. The Spirit of the Tropics runs from Brisbane to Townsville once a week normally although there is a second service on occasion. This service is a party train of sorts.