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: I had almost all of the Jean Auel's books and needed this one to complete my collection. It turned out to be a book club size and I traded it to a friend for the full size version.
Example Output: Positive

Example Input: this product does exactly what it says it does! the only issue is the first time you put it on it is pretty difficult to put on. the hook and eyes are stiff but once you do it a couple times it becomes much easier!! Don't give up it is worth it!
Example Output:
Positive