The approach to interpersonal communication is very flat and it is pleny of individual written exercises. I had the impression that this is a book for a person that has never ever thought abouth interpersonal communication and wants/has to prepare a workshop. For specialists in communication it is not very helpful.
I really enjoyed his approach on "why teams do not work well". I like very much his insights about it but the implementation of it doesn't seem as consistent as his approach. Some other works on "story-telling" of "conversations" can complement what the author is saying.
This is a highly recommended book for anyone interested in human evloution. It is easy to read and full of incredible and new approaches. Opens your mind about what we are actually doing in this world.