The first part of the book, dealing with probability theory, is great. The subjects are intuitively motivated and coupled with a generous amount of examples and exercises (which even have solutions!) -- this is of course critical as mathematics is very much learning by doing.
The statistics part of the book, on the other hand, felt unnecessarily obtuse. In part, of course, there is a very real problem that standard theorems of statistics presuppose a much higher level of mathematics than a typical stats student can be expected to have, and I couldn't tell you of the right way to address that problem. Neither could this book.