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

This book has solved the problems we had while trying to manage my son's diabetes.You can find all answers in diabetes management.
Positive

This is nothing new from Gail Howard, or at all. These wheeling systems can be worked out mathematically, without paying for this book. There are also lots of websites that offer number generators and wheeling system explanations for free. If you want it all spelled out for you then buy this book, but if you are willing to do a little mathematical work check out lottery information website like [...].
Negative

I read other reviews before buying this DVD and I was aware of what to expect. I think you will learn from this DVD everything you need to know for labor. Husbands can also have fun with this video. If you dont mind the jokes and silly faces she makes then buy it. The best part is that you can re play the video again and again.

Positive