I took a Kaplan diagnostic(but not the course) in December and got a 154 now I take a Princeton Review and get a 147 after a little studying. I think i might have rushed as I also did on the first test but this time it was worst. I dont think it is all the concepts but the time for LR that freaked me out. It was Preptest 43 and it seemed way different from earlier Preptests. I was dissapointed with a 154 but a 147 I'm about to throw away that Kaplan book I bought.