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

Example Input: this DeLonghi DFH550R heater is an extremely poor product and the customer service is non-existent,doesn't have a physical address or phone number and never gives their names...buyer beware...read their absolutely ridiculous return policy before buying...if you open any package they won't take it back...if you write a truthful negative feedback, they'll be after you like " ticks on a hound " !!!
Example Output: Negative

Example Input: I ordered this DVD & several others as presents. They all arrived in good shape & on time for Christmas morning.
Example Output: Positive

Example Input: I borrowed a copy of this book from a friend who said it only had 2 readings.When my "used" copy arrived through Amazon, it was like new, even betterthan my friend's. I am very pleased.
Example Output:
Positive