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

[EX Q]: eargels replaced old and lost ones that came with my blue tooth. they fit well and got ere quicker than expected.
[EX A]: Positive

[EX Q]: This product requires a stereo player in which the balance is turned totally to the left. Most auto systems have that capability. However if you have Dolby or SurroundSound, it can be difficult (and maybe impossible) to play the cassette without hearing two recordings at the same time. Unfortunately neither the packaging nor the website will warn you of the problem. You therefore should think before buying. Once you have opened the packaging you may be unable to return the product.
[EX A]: Negative

[EX Q]: My english teacher assigned this book, one I would never read on my own. I am a 16 year old and I enjoy reading. But this book, while it does have a few good points and messages, is incredibly dull. The points are hard to get and I only understood the points after we had discussed them in class. While this book has a rather good story it's concealed by endless symbols and references, I suggest the cliff notes version!!
[EX A]:
Negative