How do you rate a book you don’t fully understand?

I’m not typically a nonfiction reader and this was my first time reading anything related to Marxism (which I know of but won’t claim to know anything about). I found some of the concepts (hacker and vectoralist classes) really interesting, while others (vulgar marxists?) sent me on a lengthy Google search - oh, the irony!

The content was delivered in a relatively engaging way and at the end of the day I felt like I genuinely learnt something, or at the very least was exposed to new ideas which can only be a good thing.