Hmm. To be honest, I found the book a bit facile; I came to this having had my one-time cynicism about 'life-coaching' well and truly eroded both by good books, and a series of excellent face-to-face coaching sessions.
But I do know that people don't necessarily respond like machines just because you push the right buttons, and (from bitter experience) people don't necessarily handle even the most skilful and careful encouragement and intervention, in the appreciative way they are supposed to do! This book makes it look so easy..... just change your approach and the world will run like a well-oiled machine.
Also, I had hoped we had got beyond categorising people as ISTJs, ENFPs etc... deal with people as people, for crying out loud, don't fit them in boxes just to make yourself feel more comfortable. It doesn't get you very far.
I'm thinking that many people would feel a bit patronised by being instructed to read this, while those who need to learn its lessons would never be convinced to read it anyway. But fundamentally it talks sense, so it gets _some_ stars from me.