Hi Mary,
You will love it!!! I went with JY in October 2012.
Lots of travelling but well worth it. Exciting places to visit and things to do. Myself I loved eating out at Ayres Rock ( part of the inclusive holiday), The Barrier reef at Cairns, again an inclusive item, plus a welcome meal on arrival in Australia and departure meal on a tram in Melbourne.
Of course there are the sights to see in the destinations you will be going to, Sydney, Canberra, Perth, Alice Springs, Melbourne, Cairns, Ayres Rock. Try and do as much extras as you can afford. I loved the Balloon flight in Alice Springs, Kuranda Scenic Railway in Cairns.
As stated you will have your time of your life - Once in a lifetime holiday with memories for the rest of your life.
Enjoy.
Eric