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

Example input: I've read this book with much expectation, it was very boring all through out the book
Example output: Negative
Example explanation: Review writer does not like the book because it was boring, therefore it is a negative review.
Q: Guess I knew we were gambling when we bought this, since about half the existing reviews said it arrived with a leak. Remind me to never to go Vegas, right? It arrived, we blew it up with the built-in pump, which worked like a charm. Seemed like it was pretty comfortable... then my son took it on a sleepover, and woke up the next morning flat on the floor. Returned it to Amazon as a defective item for a full refund. Thinking I like another reviewer's idea of just buying a regular twin-size mattress, since we would usually be using it at home anyway, then maybe get one of the pump-less airbeds for the occasional road trip, since those have better reliability stats than the ones with the built-in pump. Live and learn...
A:
Negative