Honestly, it’s a 3,5, but you really should know what to expect. This isn’t a book with deep knowledge, but rather a conspect of different ideas presented by people with various experiences. If you look at it as a mind-freshener, it’s a 4. If you want to learn something really new, it’s a 2,5. But generally, this is an okay light reading with some helpful advice, that’s why I rounded it up