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

Example input: I've read this book with much expectation, it was very boring all through out the book
Example output: Negative
Example explanation: Review writer does not like the book because it was boring, therefore it is a negative review.
Q: I needed to upgrade from 128 MB to 512 MB. The memory got to my home through UPS (plus a dog bone for my dog) within about 5 days. Installed easily once I figured out where HP had the memory on the motherboard (behind the drive chassis!). Everything is working like a champ. Excellent buy and compatibility for an upgrade.
A:
Positive