Renting a car in Australia is as simple as doing it in any European country, or North America and you can expect pleasant, trouble-free drives in this country of great diverse, and beautiful landscapes.
For those coming from the British Isles, there is the added advantage of right-hand drive cars, as Australia continues to drive on the left-hand side of the road. However, bear in mind that most hired cars in Australia are automatic, with only the smaller cars being available with manual gearchange.
Avis has a presence both at the airport and in the city. As expected from major companies, their cars are properly maintained, and they provide roadside assistance, in case of an accident or break-down.
Make sure that you take sufficient insurance to cover you in case of an accident, or unforeseen damage to the vehicle. Often, "full insurance" still leaves you with a hefty excess that you must pay to the rental company, and it may also exclude tyres, windscreen and other features of the car.