The book is interesting, but having finished it, I don't feel like I've taken a great deal from it. He raises a number of interesting ideas worth considering when designing for human-machine interaction, but he seems to labour his points, repeating the same ideas again and again. The various chapters draw the same conclusions and are not very distinct from one another. You could read any one chapter individually and develop a sound understanding of most of the ideas he presents.
He references his own books on a number of occasions that became a little tiring, and the book seems almost a little self-indulgent. The afterword is just bizarre and a little patronising. Having abandoned "The Design of Everyday Things" halfway through, as a little voice in my head shouted *ok, I get it, think about people more*, I was determined to finish this one, though I am left feeling a little disappointed.