I got a 7/7/7 57 my first try, with 10 hours of studying spent on brushing up my math skills.
As far as the actual administration of the test...I had extra time in every section to check back over my answers but hauled ass through them the first time. If I couldn't make much progress right away I would mark the question and move on.
It really is an aptitude test that requires skills you have built over a long period of time. It's difficult to wing. I found the mechanical comprehension the most difficult. Math was about geometry/trigonometry level.
I recommend using all the study materials on this site. I used the ARCO book and a few of the other supplements you can find on here. I also went online and practiced random math story problems.