From my reading of the scheme, even if you complete their type rating you're not guaranteed an assessment, those recommended by the training school may get an assessment. So you may or may not get recommended by the TRTO for an assessment that you may or may not get invited to that you may or may not pass. Too mant may or may nots really, I'm too old for it anyway.
Good luck to those that choose to apply, I've a feeling you may well need a fair bit of luck.