I had been a part of lean 6 sigma processes and VSAs before and wanted to refresh my understanding of the principles. This book hits the spot. For some of the more mathmatically minded some revision of normal distributions and standard deviations would be useful, but otherwise the break down and completeness of each chapter makes this not only a useful package in its own right but also a useful refernce tool.
I suppose it does what is says - an quick crammer for L6S and/or use on a management course at university. I prefer the works by Michael George which are more practical to implement effectively in a professional environment.