I'm a believer in the 'tell them what you're going to tell them, tell them, then tell them what you've just told them' approach in training, and it would seem Des Dearlove believes in it for print too. Most of the information is repeated at least three times - much of it verbatim. Overall, I estimate the actual information in this 170-page book could be delivered in about 120.
Having said that, it gives a concise overview of how Gates works, and to some extent how he thinks, and is a reasonable presentation of the sources of his success, albeit in fairly simplistic form. Worth reading as a coffee-table book. NB: written in 2002 before the anti-trust case was 'resolved'.