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

[EX Q]: This set of assorted short tracks is hard to avoid if you want to create a track layout of even an intermidiate size. The male-male and female-female pieces will provide a dramatic increase in the number of layouts possible as you can now overcome the problem of curves returning to the starting position.This is a must-have for any Brio enthusiast.
[EX A]: Positive

[EX Q]: My 2 year old son is huge Thomas fan. This DVD has long introductions to each story in which children and adults are interviewed - my son couldn't care less. He just wants to see trains! We have a portable DVD player, and it is a big pain to try to fast forward past these introductions, and he (and I) just ends up frustrated. My advice - pick another DVD.
[EX A]: Negative

[EX Q]: I just took a photography course and this book was one of the ones recommended. It is a little shallow, but covers all the basics and all the items covered in the class. It covers all the various topis from portrait to building photog as well as types of cameras, etc. If you want a basic book, this is the one to get. However, if you are looking for a lot of depth, keep looking. Then again, it is "Keep it Simple" so it delivers just what it says.
[EX A]:
Positive