I found this book to be amazingly good. Equities traders should be forwarned that "Optimal f" is employed here for commodities traders that can make use of big margin, but Vince may have addressed this issue in his more recent books.
It seems a quite a few people get angry or perplexed by optimal f, and the reasons boil down to a handful: Objection: Employing Optimal f will introduce you to levels of risk (large drawdowns) you find disagreeable. Response: That's OK, the mathematical reasoning is not invalidated by the extent to which one is risk averse. If you don't like using the largest historical loss to calculate Optimal f, you can use far larger datasets to produce more radical outliers, or even estimate catastrophic (percentage) losses.
Objection: The whole scheme seems a little too radical. Response: This is the very thing that makes the book so refreshing. Vince has done his own thinking, and he has done quite a bit of thinking very carefully. I wish I had him on my team.
Objection: The book contains too much math. Response: yes, this is mathematical stuff we are dealing with. You can trade more simply, but some of us want ideas for a better edge.
Objection: The book contains primitive math. Response: this is a product of the author's kindly tone. He is not attempting to astound you with his knowledge, but advancing new ideas in plain language, and try to keep the stragglers up with the main pack as they read. I found the tone conciliatory and courteous.
Throughout, Vince does his own thinking, and the burden of the book is not what you usually find. Most trading books I have read contain a little useful material, but seems to have been launched mainly to gain the author fame and income. This book is different. Vince has real ideas, thinks way beyond the "safe zone" and the book has completely reshaped my understanding of money management.