as an example, in germany you are not allowed to pratice for the tests. if you have practiced, the psychologists will se it and you are out.
the reason is that most of them who have practiced for the tests passed the tests but failed the training(and in germany 80% pass the training).
it is possible that in germany more students pass the training because it is not allowed to practice for the tests. but it's only my opinion.
it is your decision if you practice, but believe me, it can't be useful when other ansp say that it's not allowed to practice.
and the thread is useful because you know such things as dress smart, know things about the company and you can find/meet other candidates.
ps: dress smart is important for the interview,not the feast.