I paid the $1800 for Kaplan, and I think it was a waste. The only thing of any value in the Kaplan package was the idea to put a post-it on my bathroom mirror with "45T" on it.
I found the video lectures painful to watch. It essentially consisted of someone with poor diction reading the book to me.
I think the Kaplan review books just aren't dense enough. I based my study plan on the famous SN2ed study plan:
http://forums.studentdoctor.net/showthread.php?t=623898
I used:
the Berkeley Review for the sciences
the Princeton Review Hyperlearning Verbal workbook
101 MCAT verbal passages from EK
Anki - for flashcarding all nomenclature/concepts as I went along
ALL official AAMC materials (practice tests, assessments package, etc)
I sat in my school library with earplugs in and churned through the material for 8 hours a day, 5 days a week, for three months. I started every day with verbal. I got through all of the TBR books in the first two months, including all the homework and chapter tests. I did not re-read any of the chapters, I used Anki for review.
The last month I used Anki to review in the mornings, followed by official assessments, etc. I scheduled out the official practice tests, working my way up to two tests a week the last two weeks. I took two full days off before my exam.
I scored a 38. Not the best around here, but not shabby either.
If you are the kind of person who needs classroom instruction to stay motivated, then perhaps you should consider Kaplan classes. I don't recommend Kaplan online for anyone. If you can do it from books on your own, get the berkeley review. The full set cost me $240 new. Well worth it.