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

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
The designers threw in the works and the lone star represents a point for design ingenuity. Problem is this toy is nearly impossible to build and it's more than the comically unreadable directions that are at fault. I have built many a toy but never found one this resistant to having its snap on parts snap on and of course if and when they finally do, the least shake will undo your labor. Sure to end in tears and frustration for all.
Answer:
Negative