Neither. IMHO you are better off to buy their review books at about $75 apiece or free from friends/libraries/Pre-Med Office (from both sources plus Exam krackers), buy the practice MCAT from the AAMC for around $200, and just study by yourself for 3-4 months. Make it a goal to review two review books, take a full-length practice test every couple of weeks or so on a Saturday, and save yourself the money.