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

Example Input: The product seemed like a good idea but wish I had read all of the reviews before ordering. The product is not sturdy at all. It didn't come with the number of screws noted on the instructions so I had to go out and purchase more in order to finish putting it together. That was after I spent way to much time trying to decipher the instructions. Also, the clips that hold the bag to the frame are very tight and very difficult to put on and remove. I've torn every bag I've used. I hate wasting my money; but, I'll have to buy a better one.
Example Output: Negative

Example Input: Last year I found this book and once I opened it I could not put it down. Bugliosi is excellent at bringing the details to life on the page. Not only do we get a first hand account of the trial, but he also explains much of the legal process in very clear and understandable terminology. I am now a fan of his work and will be reading everything I can of his.
Example Output: Positive

Example Input: I had another airbed that lasted about 2 years before there was a leak and needed to replace it. This one had pretty good reviews and it was taller when inflated and would be easier to get on and off it. I did like the airbed and it was comfortable. We used it less than 5 times over the last 4 months and it deflated slightly last time I used it. I should have investigated further at that time but just deflated it until next use. I used it this weekend and had to pump it up again in the middle of the night and I think my time for warranty is over with.
Example Output:
Negative