I apparently am the only one with this opinion... But I took the online Kaplan course and would highly recommend doing so. Yes, the book has all the information you need, but I have a lot of difficulty getting myself to just sit down and read, so the online lessons were really helpful to me. Plus, they not only teach you the material in the lessons, but also good strategies to help you get through the sections on time.
I got really good scores in all but one section, and I attribute that to Kaplan.
I agree with the previous poster! I am SO thankful that I took the Kaplan course, although I will agree with other people that the classroom part wasn't really that helpful. I took the class itself back in February, and then finally took my test at the end of August this year. I don't remember my diagnostic score, but I think it was around 320, and I got a 380 AA and 390 TS on my actual OAT.
Here are my pros/cons:
Pros: You can't get access to the online materials without enrolling in the course (for those of you just planning on buying the books). The online materials were super helpful. For example, multiple practice tests got me familiar with the interface and the timing of each section *on the computer* (that was key! The reading section is so much easier on paper). There are some online workshops, quizzes, and subject tests that go a little beyond what you are asked on the OAT, so it really forces you to have a deeper understanding of things. The hard copy resources are great too - for physics I just memorized the flashcards (and didn't read the chapters or do the online workshops, because I was out of time) and I got a 350 on that section. I was getting like 290 or 300 before Kaplan. The big huge "Lecture Notes" book is incredibly helpful too. I read every chapter for both biology and gen chem and scored 400 in both of those sections (also did every online thing at least once, and often multiple times for those sections). Their strategies for the reading section were helpful for me, so that's the one thing from a "class" that I thought was beneficial. Other than that, other posters were right about the information just being way too general. My teacher did give us extra pages of information of concepts he thought would really help us (like listing the important enzymes, short cuts for the math section, etc.).
From what I remember, my point boosts from my diagnostic to actual OAT were:
Bio +100 (used Kaplan a LOT for this section)
Chem +80 (used Kaplan a LOT)
Ochem +60 (used Kaplan a little - online workshops, a couple book chapters, and some of the flashcards)
Physics +50 (used flashcards only)
Math -40 (*tear* lol...didn't prep for this section at all)
Reading +70 (used Kaplan strategies and practice tests, did not use any other materials from Kaplan. I think this was WAY easier on test day in comparison to the Kaplan materials...so that point boost is probably mostly just the fact that the Kaplan test is harder than the OAT)
Cons: It's really only useful if you have a lot of time to devote to it. I spent basically the whole month of July and most of August studying for multiple hours every day. Admittedly, I didn't use the Organic Chem material THAT much, but I also felt like I needed to supplement it anyway, and used another book (don't remember the title, but it was a book put out by a chem professor and it's organized by chapters with just sample problems and then explanations for them. All the answers are handwritten. SO helpful!). I also didn't really use the math materials that much, because I was always scoring 400 on the Kaplan practice tests for the section. Yet on test day, I had a bunch of problems with multiple steps that took more time than I ever used on the Kaplan practice tests...and I ran out of time and got a 360 on my actual OAT for that section. If you are only planning on studying for a week or two, you won't have time to make use of all the resources Kaplan has, and then you just skim the surface of it all and are wasting your money.
Yes, it's costly, but I think $1500 will be pennies by the end of Optometry school. Plus, lots of schools' scholarships are based at least in part (if not solely) on your OAT score...so getting a point boost might get you as much as $1500 (or more) in scholarships, effectively paying for the class.