I'm a full-time test-prep tutor and have been for the past several years. As such, I'm familiar with the past few editions of the Official SAT Study Guide. The version of this book WITHOUT the DVD is essential, as it's the best source of real, College-Board-authored SAT tests.
The only real difference between this version and the non-DVD version is - you guessed it - the DVD. (Ok, there's also a snazzy new cover.) Is the DVD worth the extra cost? Probably not:
1. The DVD does have a new practice test, but between the book and the tests the College Board offers online, you'll have about 13 real SATs, which is plenty for the vast majority of students. If you really want one more test, getting the DVD may be worth it.
2. The SAT test timer can be duplicated with any electronic timer.
3. The math concepts video only explains a few questions.
4. The SAT Skills Insight Video and Additional Tools are more marketing than anything.
Keep in mind, any information that ETS provides to help you solve SAT questions is not going to be very insightful - after all, the maker of the test is not the source to turn to if you're looking for tips and tricks. All in all, this version looks a lot more like an attempt to make more money for ETS than to provide new, helpful material. I'm pretty sure ETS is banking (pun intended) on buyers' tendency to get the most recent version of any test-prep book. I hope this review gives you some information to help with that decision for this book.
If ETS had offered a few new tests on the DVD, it would have been worth the extra money.
If you're looking for SAT help or have a question about the test, just lemme know!