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

Example Input: Umbra Coretto 24 to 36-Inch Decorative Tension Rod, BlackThe rod is really good looking. However, because it is so thin, the weight of my shower curtain keeps causing the rod to come loose. If I had any idea, I probably would not have bought the rod. However, my shower is at the wider end....so maybe a person would have better luck if their shower is closer to 24".
Example Output: Negative

Example Input: While old and out of print, this book is a very good way to learn the basics of photography. You have to ignore most of the references to digital cameras as the technology has changed a lot.
Example Output: Positive

Example Input: This is it. The best, most heartfelt debut I've heard in a long, long while. Lhasa sings of love, rejection, defiance, vanity, birds in the desert, the fish in the river, the tree of forgetfulness, all with a voice that is now sweet as desire, now wrenching as a lover's scorn. The music reminds me alternately of fado, klezmer, cabaret and Kurt Weill. And the girl is only 25. One can only wait with bated breath and hope it won't be too long before the second album appears. Meanwhile, I'll try not to wear out this CD!
Example Output:
Positive