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

Input: Consider Input: All I have read about these was pretty much true. You can remove the rubber piece and press these over the part that it was attached to and they will stay, but they do come out with a little tug. A fine line of rubber cement will fix that though, and it peels off if necessary. But the great thing is that they will hold the Jabra in your ear without the ear loop. And that's huge, especially for someone like me with really weird shaped ears that nothing else [except an over the head headset] seemed to work. All in all worth the cost easily. I just wish you could order multiple pieces in one size only. If I lose the 1 that fist my ear I have to buy a 6 pack again just to get the one that I need.

Output: Positive

Input: Consider Input: If you need a grammar reference, this may well serve until you find a better one. It might be of greater utility if the tone wasn't vaguely condescending and pedantic, and it eschews the panoply of actual examples in favor of definitions. To wit: the 2nd person singular present perfect conjugation of "to love" results in "If you have been loved..." gives me one (singular) example but not the rationale of when to use this. The density of the text preceding the example conjugations will require your own self-study to master (if you must) the ability to spin off a subjunctive 3rd person plural present tense conjugation.The best recommendation I can offer for this is as a companion for language learners who need a quick reference for English analogs of other-language conjugations, such as when you try to conjugate "falar" and need to know which one to use.--#

Output: Negative

Input: Consider Input: Although this might be a good book to introduce issues in technical writing to someone considering the field, it is not useful if you want anything more than a broad overview. The information it contains varies widely in depth and is sometimes dated; for example, there are several paragraphs discussing the features of dot-matrix printers but only one short and incomplete list of the types of bindings available for professionally printed documentation. For some unclear reason, two sections on editing are separated by 10 pages on usability testing. If you are actually involved in technical writing, there are better books.
Output: Negative