The printed contents of this book with the DVD are the same as that of its predecessor without the DVD, The Official SAT Study Guide, 2nd edition. I gave this book five stars for the same reason as its predecessor: it contains the best practice tests available.The difference between this book and its predecessor edition is the DVD and the price, which on Amazon is an extra $8.11 (Amazon prices as of Jan 5, 2012). The answer as to whether the DVD is worth the extra cost will vary.Many students have complained that College Board books do not contain explanations to the problems on the practice tests, only an answer key. Those who purchase either edition of book (with the DVD or without) will be happy to know that they can have online access to the explanations. I should note that others have independently published books with explanations to the College Board practice tests, but I am not familiar with those and cannot compare them.The biggest difference between this DVD edition and the no-DVD edition is that the DVD contains a bonus SAT that was administered previously. If you anticipate needing another practice test (many students do) then that alone is worth the price. Explanations to the bonus test are also available online.The DVD contains some videos and other tools that students may find useful. But some of these are already available on the College Board web site or in the SAT Preparation Booklet (these booklets are sometimes available at your school's guidance office). Some details:-- The DVD has a useful video called "Math Concepts" of a teacher going over solutions to math problems. But only ten problems are discussed.-- The DVD has something called a "Practice Test Timer" which is useful for students who want to do a full length practice test. It is somewhat similar to the "Test Day Similator" found on the web site.-- The DVD has a test day checklist which is almost identical to the one on the web site.-- The DVD has a "Math Concepts Reference Guide" which is identical to the "SAT Mathematics Review" on the web site and in the preparation booklet