I like the no non-sense presentation of the material. The book moves very quickly. It is dense in topics, but the presentation is very readable. You'll often wonder why you're not further into the book... yet you feel that you have really covered a lot of material.
The explanations are great. And I have found that by answering the questions, that I catch tiny little mistakes in my understanding.
I picked up this book after a debate with one of my friends over a trig question. I am very satisfied with my purchase and highly recommend this book.
John D.