While I agree with the premise (God has created each of us with unique gifts and talents to fulfill His specific purpose for our life), this book is not written from a Christian perspective.
When describing several of the themes (talent areas), it becomes obvious that these are secular descriptions that were likely taken verbatim from another one of their books with Bible verses (many of which are a stretch) tossed in afterward to Christianize the concept. The writers did not ask the question "What would this theme look like from a Christian worldview?" and then write a description specific to the Christian faith. Anti-Christian concepts such as spiritualism and karma are described, though not named, in the discussion of the different themes. My husband, who was assigned this book as part of a seminary leadership class, was extremely frustrated by the tendency of the book to attribute his actions to non-biblical motives and beliefs.
Additional problems can be found in the chapter on how to implement your theme in the church. Several of the themes include encouragement to tithe as a way of stroking ones ego and tapping into your theme, ignoring the widely taught evangelical belief that the tithe belongs to God and its surrender isn't subject to whether God has given a person a specific talent. Once again, it is an issue of not understanding Christian motivation. Other themes encourage inter-faith promotion (i.e. many ways to heaven) as a path to world peace. From a biblical perspective, this "peace" is a false hope in direct opposition to Scripture and the effort to attain it will be at the eternal expense of many souls.
A note on the online assessment: The book comes with a one-time use code to complete an online assessment which is supposed to identify a persons top five themes. The book is of very limited value without taking the assessment, especially since its lack of a Christian worldview makes some of the themes harder to establish close identification. My personal opinion is that the use of this code was to force sale of new books and hinder the used book market. Also, when taking the assessment, those of a more deliberating or exacting personality may have issues since only 20 seconds are given for each question and there is no visible timer on the page. Unanswered questions are not repeated and can skew the results.
Overall, I would caution fellow Christians when reading this book and those similar to it. I agree with other reviewers who have said that this book was rehashing material that appeared in the secular versions of this book while trying to monetize on the Christian segment of society. It may be better to read the secular versions in order to activate a greater level of discernment when reading and not be lulled to passive acceptance by the Christian labeling. While psychological research has shown a great ability to explore how God made us, the field itself has historically been biased against religion, viewing Christian revivals as a precursor to insanity. I do not want to disparage Christians in this field, but it is very difficult for even them to separate the data from a tradition of anti-Christian interpretation of data. How much more difficult is it for the rest of us who are not experts? Psychologically based self-help books should always be read with prayer for discernment. In the end, they are still man's wisdom and likely to error greatly when compared with God's Word. The Christianized versions are no exception.