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

[Q]: The title of this video mentions Argentine Tango. Unfortunately, what is being taught on this tape is not authentic Argentine Tango. Not even close. It's ballroom tango. There is a huge difference: in music, style, steps, posture, etc... Don't be fooled by ballroom instructors trying to teach Argentine Tango. The only authentic instruction available on the market comes from authentic Argentine instructors from Buenos Aires.
[A]: Negative


[Q]: I have been buying Hi-Tec for years. When I found the Altitude IV I fell in love instantly. This shoe fits great, has little break in time and still holds its sturdiness as it ages. Well recomended.
[A]: Positive


[Q]: Koontz turns the Frankenstein mythos into a cop story. The single, hot, emotionally distant cop...her laugh a minute partner who secretly loves her...the gruff rival detectives with questionable motives... No cliche is left unturned. The most interesting character...the first monster...gets the least "screen time". And the ending?This was just awful.
[A]:
Negative