As someone who has been doing CrossFit for over a year now and entering my second Open season, this book is great as a supplement. I was slightly hoping for a more memoir-like book, but I felt like there were a few gaps along the way, though Mat's story was very eye opening. I think if you watch his videos, and have followed his journey otherwise, this book can feel kind of redundant, BUT it's great to have physically, jot down times, notes, and Sammy's AMAZING recipes.