It helps with my Japanese a lot and actually reflects what I learn in Minna no Nihongo textbook in class.
If you're just beginning to learn Japanese, consider this book!
Be careful and pay attention to the other reviews. The translations aren't perfect but that's not how I use the book. The women's voice is over exaggerated as well. But, for my purpose the book is sound. (And that's just to develop a nice rhythm as I talk in Japanese.)