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

Example Input: I was looking for a shower door that could open from either the left or the right and I did not want one to choose for me. This door ticks and fits all the right boxes in that department. I like the crystal glass effect too. It is very clear and allows a lot of light into the shower hub. It is frameless too which is what was asked for by the wife.Its sturdy quarter of an inch thick glass also is a nice feature. But most of all the pivot door is a feature I got on with too.
Example Output: Positive

Example Input: The old saying hollywood never lost money underestimating the intelligence of the american people really hits you in the groin with this head shaker of a release.While the orignal classic rollerball hasn't even gotten an anamorphic dvd release, let alone a blu-ray!
Example Output: Negative

Example Input: Macally is a terrible company. NOT worth the money you save. I recently bought a power cord thru them that emits an electrical current thru my computer. They will only send me a replacement but won't give me my money back. Not worth the risk. Buy Mac!Macally PS-AC4 AC Power Adapter for Apple G4
Example Output:
Negative