Mildly interesting, at times insightful, yet mostly shallow, anecdotal, and lacking any major revelations. Much of what is presented here is basically common knowledge among people interested in human psychology and behavior. For example, much is made of such matters as people being unreliable eyewitnesses, the majority of people being overconfident about their knowledge and capabilities, and the way that our own misapprehension of our aptitudes and weaknesses interfere with our ability to improve.
If you’ve found your way to this along the trail of more interesting, surprising and entertaining books on human knowledge and behavior as Outliers or Freakonomics.
If you approach this as a sort of “human psych 101” you may enjoy this more than I did, but there are better books than this on the same and related subjects.