From my point of view, the Aussie English Podcast is the great resource to learn or improve your current knowledge of English.
Besides this, you can also gain a lot of knowledge specifically about Australia (history, endemic plants, animals, facts etc.)
After 6 months of being Aussie English Academy member, I felt that my English was improved, pronunciation become much better and my listening skills enhanced.
So, if you want to be a great English speaker, the Aussie English Academy is definitely for you.
At least give it a try and result will surprise you!