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

Altough the content on childbirth is descriptive (at times a bit too descriptive), the commentator/director Sheri Bayles is one of the most annoying, irritating, wanna-be-actresses that my husband and I have ever seen. Her approach to teaching by injecting humor is painful, and it took all of our strength to not plug our ears and cover our eyes to watch this woman. If you can handle obnoxious, loud and nerdy instructors, then you may enjoy this DVD. The 5 couples she works with in the instruction look bored and confused.
Negative

As a student of jiujitsu i understood alot of the moves but i found that without previous knowledge these pictures and instructions were difficult to understand. I feel there is alot of good information but not worth buying.
Negative

I bought this grinder because it could be operated with one hand. However I was very disappointed in the volume of pepper it puts out per squeeze. If you are looking for a good wrist strength training exerciser this is your grinder.

Negative