It has a lot of valuable ideas in here. Yes, most of this is already known by the public and especially by a cognitive science student like me. 
But still, I like how this book is set up and the whole premise that each one of us needs to do some self-experiments to figure out what works for us.
I think I will go back to this book occasionally for extra inspiration and just reference when talking about doing things with my friends.

Some points where I disagreed, tho. Ali Abdaal is giving his best not to promote unhealthy expectations or overwork, but I think he didn't get it entirely out of his system.
Even if we are not going to do one more "productive" thing in our lives, we are okay. Totally ok!