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

Example Input: So far I'm very happy with my boots.They fit well and seem very well constructed.Time wiill tell how they perform but so far so good.
Example Output: Positive

Example Input: I bought this video while thinking to myself, "hot chicks beating the crap out of each other, sweet". Well, none of these things turned out to be the case. The chicks aren't hot, in fact one either used to be a man, or still is a man. The violence is limp to say the least. Imagine an episode of cops where neighbors at the trailer park are in a domestic disturbance. The problem is that the girls aren't athletes, nor do they seem to care much if they win. Stay away, this is just some dude with a camcorder attempting to get you to part with your money.
Example Output: Negative

Example Input: it's an interesting idea to have a operatic female vox in a metal band; however, her voice is mediocre (you'd know it's true if you know some names from the opera genre), and the music is not original at all. Does anyone know any similar bands (with operatic female vox) that are better than this? Let me know. Thanks!
Example Output:
Negative