First and foremost, McKenna is a psychologist, and he obviously has a very thorough understanding of practical psychology and knows how to help people develop. Further, he's done his own research and is a free-thinker. This book is a result of this great combination, and it works.

Don't be fooled into thinking you won't benefit from this sort of book unless you're unwell or unhappy. It's an all-purpose guide to improving yourself.

Some of the excercises, particularly the subliminal CD are hard to accept, but the best way is to just follow them and accept them will work - you have nothing to lose. Another drawback is perhaps the expectation that you need to set aside 60-80 mins for the CD and a chapter each day for 7 consecutive days. If you can't, do it when you can. I did it when possible, and it was effective.

The practical examples and anecdotes make the material easier to understand and make them more meaningful. The excercises are worthwhile, and are to be done, not just read about. It is genuinely a practical programme with clear objectives and a structured, useful approach. It's easily read, but not lightweight, in that there's no 'filler' material. It's all worthwhile.

I love the little quotes and facts from the people McKenna has studied. They mean a lot, and he hasn't selected them by mistake.

Human character is a fascinating subject few of us appreciate. This failure to grasp it leves many of us failing to fulfil our potential in many directions. I'm now doing things I couldn't have done years ago, partly because of help from this book. I think differently, and approach problems and challenges differently. I would suggest to anyone that taking it on board and giving it a serious try is going to be worthwhile.

Mr McKenna, I feel I owe you a drink. Thanks for your help.