Good book, not so super heavy on the cool-aid and more based on what was done so liked that. very worth while. Wish it had a bit more concise plans and summaries. (however found some presentations that he gave with some nice whiteboard shots that were useful - perhaps just the ebook was missing these?) Not sure if the comparison is correct, but wish it was a bit more in the instructional flavour of "Scientific Advertising" but defiantly worth recommending and reading if for nothing else to understand the terminology being used by people discussing the lean startup method, (Like "Learning" for example) which tend to be different enough from what most would assume, that conversations without definitions can be confusing.