Hi Brijeshm, You asked a question about Examcrackers in the other post that got a bit off track. I thought I'd give you my opinion as neither a teacher, owner, writer...etc. of MCAT material. I took the MCAT in April and studies minimally on my own. I ordered all the EC books and AO about two weeks prior to the exam. I didn't do very well. ( Not a surprise.) I have been taking a Princeton class and studying both their materials and my EC. I live in Florida, so an EC class was not an option. I choose Princeton over Kaplan strictly because they offered more actual classes for the same price. For Bio, I prefer the EC book. The Princeton book is filled with so much detail it is overwhelming. ( At least for me.) For Physics and Chemistry I prefer the PR materials. I feel they explain the subject matter in an easier manner to understand. EC confuses me, especially when they go into the different energies and equations. I get lost with EC. I think Princeton tends to keep it "more simple." For Organic, they are both good. The Princeton science workbook is awesome. I think it probably has the most realistic passages as compared to an actual MCAT. The 1001 questions for both chem and orgo have been helpful. I find the chem questions can be pretty tricky, but I figure if I can understand the tough stuff then the easy stuff is all the more easy. The AO I don't find very helpful. I am definitely a "visual" learner and have a tough time with having just an audio to comprehend from. I use it strictly as an extra component when I am just too tired to read. Anyway, I take the MCAT again next week. That will be the deciding factor as to whether or not ANYTHING helped. Good luck!