There's nothing very profound about the advice in this book. If you've read Presentation Zen, Slide:ology or The Non-Designer's Design Book, you'll get more useful advice than in this book which reads like it was written in a month using whatever top-of-mind advice the author could recall.
The slide examples are overly simple. No business person would present these slides. And the writing style lacks business gravitas.
The simplicity of the writing style and advice might be appropriate for elementary school children learning PowerPoint.