Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Q: I could not give this book a full 5 starts. For whatever reason, the book seemed to "bog-down" and I just wanted it to end. I will continue to read the series, but this one was not my favorite.

A: Positive
****
Q: I thought this movie was boring and it didn't let you get to know any of the characters. The only good thing in this movie is a young, cute Mel Gibson.

A: Negative
****
Q: As a member of Toastmasters I have access to a wide variety of materials and seminars on public speaking. However, this one book covered more material in less space and in easier terms than all the seminars I've attended. His style is not that of a college textbook - if it were I wouldn't have read it. His style is straight from the hip. I consider this book to be my textbook, with Toastmasters providing the chance to practice what I've read. This book has done more to improve my speeches than the formal Toastmaster's evaluations.

A:
Positive
****