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

Input: Consider Input: Received this in great time- I have no problem with the seller:-)BUT! The inside of the case lists all types of materials this can cut including metals, which is what I got it for.One punch through soft 26ga copper sheet and the edges of the punch bent & in some areas, flaked off. The second disk I cut did it in completely. I had to file all of the edges and it probably would have been easier to cut the sheet with shears.So, not for metals.However, I can see it would be great for leather, paper & plastics.To me it was worth the money spent on the chance that it would actually cut metal disks.

Output: Negative

Input: Consider Input: The case I had didn't fit properly - the window obstructed the rightmost side of the display. You could shift it over, but it would always shift back. I don't know if they are all that way (maybe I got a bad one?), but I didn't want to buy another one to find out.

Output: Negative

Input: Consider Input: Always been a Cocker fan and this one will not disappoint. Given the age of this concert the sound and picture quality is OK...would rock in blue ray however!
Output: Positive