Well the PPL confuser does pass you most of the time, well if not most of the time for me. But when you get to the ATPL exams stage you will start to regret it, well I mean really really regret it, as all you will have is A,B,C and D. And not the real knowledge you need to fly the aircraft, but using it as a guide won't harm you, as the CAA do seem to put some strange questions with very strange answers, so do use it as a guide, but don't rely on it.
Brian304