I used only the Kaplan test prep self-paced. It helped a lot, their methods and the information that they present to you is no more and no less than what you need for the test. I didn't get a chance to go thru all the study material because I only had it for about 2 weeks but my chemistry and biology scores improved a lot! When I took my diagnostic I got a 9 in biology and a 40 in chemistry, 38 composite. I used their materials and my preliminary report scores were 72 for biology, 74 for chemistry and 70 composite. I know if I had more time to study I would've hit 80s maybe even 90s. The full length tests that come with the course are great! when you get to the test you feel like you're doing another test at home.
I know some people also recommend Dr. Collins and Pearson practice exams. I personally did not used them so I can't speak about those.
If you are trying to do Kaplan look into their tuition assistance program (I think its Star line or something like that) you can get discounts on the courses or get them even for free! I did and it was a blessing!
Good luck!
