I had a great time reading this book. For reference, I am a fairly new F1 fan, but I have lots of background knowledge. I'll start with the small things I disliked about this book because, overall, I have mostly nice things to say. My main complaint is that sometimes in the storytelling, the timelines would jump around a bit. These jumps made sense narratively, but sometimes it made it hard to remember exactly what year/season was being spoken about. My secondary personal problem complaint is that I got the ick a little bit for F1 during the vegas chapter. It was all information I already knew but putting it all together in conjunction with the narrative voice of the book made me think about it too hard <3. Still like the sport and the book I just had a small moment. 
As far as positives I think everything else about this book is so well done. There is a great mix of topics from engineering, to business, to personal stories, to team stories, and loads of new information. I think the balance between commonly known information and more niche info is balanced very well. In the Senna and Schumacher sections its almost impossible for fans of the sport to be completely ignorant of these eras but a great job is done in explaining who these men are and what made them special without feeling redundant to someone who knows the lore. 
Great book for all levels of F1 knowledge.