instruction:
You are given a review of Amazon's food products. Your task is to divide them into two classes: negative or positive, depending on the content of the review.
question:
I have older mats that have a ribbed surface and work great. These have small stiff points and actually hurt to lean on or kneel on. I can imagine that they hurt my cats paws ad that is why they tend to jump over them when exiting the littler box.
answer:
Negative


question:
If you follow their recipes precisely, with careful measurements, the freezer jams are excellent.  Strawberry jam is particularly appealing.  I've been warned that changing quantities of any ingredient will not have happy results.
answer:
Positive


question:
I bought this without realizing that it is a product of Taiwan.  Considering all the health risks from eating foods made in China, I don't think I can trust the ingredients used in this product.  As I understand, Taiwan, Japan, and Korea, all import many food ingredients from China, and they have found many harmful chemicals in them (I am not even including those that are unsanitary, i.e. made from sewer water).  So what guarantee is there that this product do not contain carcinogens or other harmful chemicals?  FDA do not, and cannot, test every single foreign product coming into U.S.  Eat at your own risk.
answer:

Negative