Hmm... well, I've been reading several negative reviews of this book to try and articulate my own dislike of NVC.
I can tell that you, like several of my friends, are getting a lot of value from it. I can relate to this:
"When we are internally violent towards ourselves, it is difficult to be genuinely compassionate towards others."
But I still find NVC to be mechanistic and it is unpleasant for me to be communicated with in that way. On the other hand, I can understand that if something helps you feel more peaceful inside, you would like it.
I guess its just different strokes for different folks. As for me and my self, I like The Solution training by Laurel Mellin. The training addresses emotions and getting needs met, and connecting with other people. It just seems to do it in a more uplifting and full way for me.