I found this book to be useful in getting across the ideas in Hamlet and Henry IV. The activities are directly related to understanding the text. Instructions are written out to the letter, and a number of outside resources are suggested. This has been one of the most useful aid I have used in teaching either play. The ideas are clear and inventive. My students responded positively to the activities that I used from this book and came away with a clear understanding of plot, characterization, and language.
The only negative comment I have is O'Brien can get a little flighty once and awhile. In truth, however, she gets to and stays with the point better in this book than in any of her others. I find myself going back to this text to supplement her others. She stretches a bit too far into the artistic than my taste allows, and I don't feel that she goes into enough detail in some parts of Hamlet, but these are things that are easily supplemented. Nevertheless, this book sets up the premise for teaching in a very effective way.
Once again, this is learning through movement and acting. No wallflowers or shrinking violets allowed.