I did mine a couple of months ago, studied both ATC and Bob Tait and to say the least they were way off the mark, I passed but got a few that I really had no idea about. Having said that still being a relativley new addition at that point I don't really think anybody knew what to expect, I think CASA have now issued some material explaining exactly what needs to be covered so get your hands on that and you shouldn't have any problems.
