This book tore me in two. There's not a shadow of doubt in my mind that the information in this book is great. More so it's given me a vocabulary for describing things I knew were good. Also on the plus side there's a good practical feel and some variation in business models and sectors which stems the fatigue of storytelling.

However, as someone (John Barton?) mentions in their review, there's some bias (understandable but none-the-less there) to success and there's an over-reliance on IMVU as a case study. A second edition may fill out with more diverse case studies and you'd hope some failures were examined. Finally, the Lean Startup also suffers from the hyperbole of any business book. You don't sell an improvement, you sell nirvana.

Overall go into this book with your eyes open and prepare to feel sold at sometimes and this book will give you some good things. I'd read it again and I've used it in conversation with others.