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

[EX Q]: I am a complete Sudoku addict and am very disappointed with this book. The only reason I bought it was because I was desperate for more puzzles and it was the only one available at the store I was in. First of all, it costs $4.99 which to me, is way too much money when you can get a Kappa book for $1.99 which has better puzzles. Another thing that bugs me about this book is that some of the answer keys in the back don't match the corresponding puzzles. When I get to the difficult/Very Challenging ones in the back, sometimes I need a little help! But unfortunately, this book has quite a few errors in the answer section so when I've hit a dead end, it's over.I would recommend Kappa books from your local supermarket. This simply costs too much money for not mush quality.
[EX A]: Negative

[EX Q]: I used this for taping while we were opening gifts for christmas. The remote features are great. This product makes video recording easy and fun.
[EX A]: Positive

[EX Q]: I've read quite a few of the Pratchett books, mostly at the insistence of my 13 year old son who loves these novels. This ranks right up there among my favorites, and is intriguing for the allusions to so many of the world's religions. The author is clearly well read, and catching these little references produced many aha! moments, I confess that I even lugged home a compendium on world religion to dig out the paralells and little obscure references - and there is alot more to this book than meets the eye. Well, but in the end, I find myself in complete sympathy with the conclusion, and thus a truly satisfying narrative from start to finish. I should add that this approach to reading this book drove my son absolutely crazy, and in fact taken only at face value, no references or allusions the book is still a great read.
[EX A]:
Positive