"Heavy on the authors' political views"
Choice architecture is an interesting topic and the authors address framing and default options in a compelling way.
No. The authors were unable or unwilling to keep their, onesided, political views out of the book. Moreover, those views did not enhance the content in any meaninful way (unless politics is what you're looking for).
Pleasing Balanced Appropriate
No
Too often it seems that university professors fall victim to the echo chamber in which they operate. Sadly, Thaler and Sunstein probably felt they restarined their political leanings when, in fact, they crept (unwelcome to this reader) into every chapter.