Other reviewers may have negative opinions, but I think the book is well worth the cost - especially if you bill your time. Yes, the material is covered in Oracle's New Features docs, and yes, this volume is not for either the beginner or the true expert. Remember, these books have to be written well before the new product is actually available, so there are naturally some discrepancies and small errors; these are rather benign in their impact.
However, Freeman has done a great job for those of us "in the middle" who are neither beginners or world-class experts. The explanations and "here's why you care" approach make for an approachable read and a value-directed understanding of the material. The practical tips aid understanding and will save a great deal of (billable?) time.
I would still recommend reading the Oracle documentation, and of course these new features must be tested in the crucible of real environments. But buy the book, enjoy the organized approach and the time you'll save by studying it. I recommend it to my user group and co-workers.