I enjoy watching the Dragons' Den TV series (UK version) and bought the book to see if I could learn anything from the Dragons. For me, it was not spectacularly useful as I already know most of the things covered.
However, I can see how this book would be useful to someone who has never set up or run a business before (or who has and did not do it properly before). Although some points are specifically for the UK market, it has lots of useful, practical tips that one would do well to heed before plunging headlong and putting time, effort and money into developing an idea into a business.
Verdict: A well-written book. An easy read with useful, practical tips.