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

[EX Q]: I hate this printer! It is nothing but problems. Every single time I go to print even a single page, there is some sort of problem! The paper jams, I get timeout errors, the ink runs out too fast and I am unable to fill it with the refill kits. The thing has a mind of it's own and starts spewing out pages even when I'm not trying to print anything. It wouldn't be so bad if it didn't put trash on each page wasting my paper. It's a piece of junk! 1 Star is highly overrating this product!
[EX A]: Negative

[EX Q]: Great book for people that need to write email. It would be nice to review the grammar rule's from time to time.
[EX A]: Positive

[EX Q]: I purchased this as an extra battery for a Canon sd800is. It is the same as the original battery and is Canon "branded". A third party battery is available locally at TWICE the price, and the Canon version for almost three times the price. This is a good buy.
[EX A]:
Positive