The beauty of this book is the simplicity of writing. It explains simple statistical concepts in simple plain English with sufficient examples. For me, I always had inertia to study statistics and this book was like an ice-breaker.
However, the breadth covered in the book is quite limited. The topics it covers in detail are z-test, t-test, standard error, confidence interval, one-way ANOVA. While topics like linear regression, chi-square test, factorial analysis are touched from the surface. That does justifies author's purpose of writing the book i.e. cover basic topics in depth while just touch upon advanced topics.
Having said that, this is an excellent book for an intro to field of statistics. Highly recommended.