I am convinced that this exam has simply become a money thing after they changed it from pass/fail. With that being said, the majority of people I know who took it went into the exam, some studying for 2 months and others a week, and they all equally seemed to have felt like they failed the exam miserably. I remember going into the exam, taking it, and feeling the exact same way after studying solid for a good 4 weeks. When everyone gets the news that they passed, and trust me, pretty much everyone passes with the exception of 0-2 people per year out of a class of 130+, you will probably laugh while questing if they mixed up your student ID number with some other dental student in the country.
Seriously though, go through decks once and don't spend too much time on one concept. Study for a few weeks, take the exam, feel like you failed, get the results, realize you passed, laugh, and carry on.