i'll say up front that i teach for kaplan, and also took the kaplan class when preparing for the mcat, so please take the following with your own best judgement (and grain of salt). kaplan in my estimation is by far better than princeton review, and that is the conclusion i came up with before i took a prep course when looking into which program was better. kaplan has a higher standard for minimum score needed to teach mcat classes than princeton review. the price of the class includes all aamc materials (including practice sections in addition to the practice tests) which princeton review doesn't have all of. kaplan's own practice material is more comprehensive than princeton review's. kaplan teaches you specific strategies (i'm not going to mention which ones, but i'll give you a hint, it's for the verbal section) that princeton review students haven't even heard of. in addition, if you want to get a sense of how prepared kaplan is and how plugged in they are to the system, take this into consideration: the aamc planned on making the MCAT a computer based test about 10 years ago in a closed door meeting with their executive board. you know who was sitting in on that meeting? a kaplan representative. so kaplan's curriculum has already been formatted for the last 10 years in anticipation of that change. princeton review and exam krackers obviously did not have any representative at that meeting. finally, kaplan basically writes out a whole script that the teachers are supposed to know for each class in the teacher's edition of the book. so there is less chance that they will forget to tell you something you should know because it's there in front of them. last i had checked with a friend of mine who works for princeton review, they don't do that for their teachers. lastly, to the comment about exam krackers cutting out all the unnecessary stuff...kaplan already beat EK out in that department. the material covered in the books has nothing less and nothing more than you need to know for the MCAT. they don't throw in any extra information and nothing is left out. if you know every word of the kaplan science material and *know how to apply it* you should get a 15 on each section. of course you might be able to say that about other test prep companies, but kaplan makes it the easiest because it doesn't cover any unncessary information. lastly, straight from kaplan memos...starting january 10th, kaplan students will be able to access all 8 aamc practice tests on the computer in a real testing environment interface. how many do competitors offer? "The Princeton Review may stick with offering only 3 AAMC exams. ExamKrackers offers 2 and Berkeley Review ‘…encourages students to purchase their own AAMC exams.' Keep in mind this information is subject to change." hope that helps.