Well, I've never used it before, but I heard it is pretty good to prepare for that section on the PCAT. I heard that most of the examkrackers materials are good for PCAT preparation, though I have not used any.
i used the mcat practice exams from kaplan and princeton, but they got me frustrated. i had problems understanding the passages and the questions require you to think a lot. the pcat passages were much easier to understand and if you really understand the passages you can narrow down the answer choices to 2 or 1. i am assuming exam krakers are similar in difficulty to the kaplan exams because their passages were hard to understand. i used just the tips from this book and they helped alot.