Myself and everyone I know took the Kaplan DAT course. I found it extremely helpful, and without a doubt, I would not have done as well as I did without the course. Although just taking the course won't ensure success on the DAT, there is comfort in knowing that others before you, and others taking the course with you are receiving all the necessary information to succeed. Although I'm sure Princeton is good, I honestly don't know anyone who took it over Kaplan. HOpe this helps. There really aren't that many tricks to the perceptual part, a few yes, but they are easily learned. It just takes practice, thats it. Lots of it. =)