First of all quantity
I have the kindle edition, but I think is the same even with paper one: when you reach 74% of book, what you have till 100% is index and notes and bla bla. But you have, also, more than 25-30 pages of "one big quote per page" and "chapter title", finally you have really a 2 hours short book to read (60% of total pages are written...!)
Then, about quality
Just quotes (one page big font quote) and short sentences, never explaining in deep "why". You can read "99u" blog or action method blog to get same or even more infos about this argoument...
Infos into the book are ok (there are no b*******!), but too (really too) superficial. THe Only good thing is that you have a website for each contributor (so you can go and find for more)., this is really the only good thing to pay for.
Finally it's not the book that will change your life, but you can read in no-more than 2 hours (so it's not a waste of time) and maybe something interesting information will switch on some light in your mind.
For sure it's a good marketing operation with behance brand as guarantee, but after this (I also read "make ideas happen") I'll not buy a third one ;-)