the 4 wheel steer is called HICAS.. easiest thing to do is search the forums on it.. there is a pic in a couple of the threads that explains it easy enough.. basically at certain speed the wheels move with the steering by a degree i think it is.. and then at faster speeds the wheel moves opposite direction you steer.. this allows the car to move around corners faster..
obviously for people like drifters.. this HICAS is a hinderance.. its personal choice as to whether you like it.. personally it doesnt affect my driving as it doesn't really come on for me.. others hate it.. you can get a lockbar later on if you don't like it so don't worry about HICAS when looking really..
And on terms of whether you want to expereince it.. ask in the Section of your area (qld, NSW, vic, etc) as to whether someone can take you for a drive.. it'll prob freak you out first time it kicks in..