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

[Q]: I have a small business and it was important that the envelope feeder work well. From day 1, this has been a nightmare. Components of the printer block the envelopes/labels and they don't feed properly. If you use internet postage, you lose money with the misfed labels/envelopes. I'm very disappointed and am shopping for a new printer now, only a short time after purchasing this one.
[A]: Negative


[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.
[A]: Positive


[Q]: This book was a very poorly written effort in my opinion. Additionally, the author would have you believe that the terriorism that exists today is the fault of the U.S and the protestants that make the U.S. their home. It would seem that the author alines himself with Osama Bin Laden and those who wish to control the middle east. It's hard for me to imagine that this man is a professor at Columbia University. Instead of wasting his time here, he needs to return to his own country for the purpose of educating his own people.
[A]:
Negative