I'd give this 3-3.5 stars. I've read a lot of Patrick's comments on HackerNews and I appreciate his good advice and insights, and his desire to help the entrepreneur community. Unfortunately, I didn't get a lot of value out of this book. I thought it was too disjoint and too colloquial in tone, and frequently name-drops and references other articles and products that I have not read or used. Some of the advice on A/B testing, copywriting, etc. was very solid.