TASK DEFINITION: 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.
PROBLEM: 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.

SOLUTION: Negative

PROBLEM: I fed this to my Golden Retriever and he hated it.  He wouldn't eat it, and when he did, it gave him terrible diarrhea.  We will not be buying this again.  It's also super expensive.

SOLUTION: Negative

PROBLEM: We have had it less than three months. We have to descale about once a week. Our water has 1 gram of hardness. Almost perfect. They have sent new water reservoir (which by the way Keurig has great help line). But, honestly for the money the Mr. Coffee is better.  You just have to add the water each time. But it works each time. It is very hard to get a consistent full cup of coffee out of this Keurig machine.

SOLUTION:
Negative