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

Example Input: Had no luck, even with latest firmware, getting the unit to resume any of my audio books. I tried changing the tags on the mp3 files but it did not work. The unit would go into auto shut off and then force you to start your audio book file from the start every time.
Example Output: Negative

Example Input: Product reviews are very subjective. Based on the reviews of this boot I hoped for a great boot at a fair price. Instead I found the boot to be subpar in terms of comfort. They shoes were stiff and far too 'roomy'. My feet where floating inside them. I returned them immediately. I've had far more comfortable boots right out of the box.
Example Output: Negative

Example Input: This DVD Trilogy box contains the two-disc editions of SM 1&2 and the single-disc edition of Spidey 3. However, 1 and 3 are available separately in 3-disc sets, and I'd be surprised if 2 wasn't given the 3-disc treatment right before Christmas. So, when the 3-disc editions of all 3 movies are available in one box (think Ultimate Matrix Collection), then that will be the one to buy. This box can be skipped.
Example Output:
Negative