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

There's not much learning either. Sheri is incredibly condescending when she mimicks pregnant women. This video could also really use some visual aids besides Sheri holding up a poor illustration, writing lists (that she doesn't finish) on a whiteboard and the worst...her on the ground, legs spread in high-waisted khakis demonstrating childbirth.
Negative

The case I had didn't fit properly - the window obstructed the rightmost side of the display. You could shift it over, but it would always shift back. I don't know if they are all that way (maybe I got a bad one?), but I didn't want to buy another one to find out.
Negative

I thought this book was magnificent. The way Vincent Bugliosi described everything in such depth. I found some of it to be dragging in the beginning, but am I glad I didn't give up on this one. The chilling reality is what got to me the most.

Positive