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

Ex Input:
I was very excited to buy this scanner and was pleased with its size and weight. However, if you have a Vista operating system, like I do, IT WILL NOT WORK! The company told me that they stopped selling this product over a year ago and there are no driver updates available for this product. If you have an older computer and an older operating system this product might work for you. But as for me it was a waste of money!

Ex Output:
Negative


Ex Input:
Only has limited access to OBDII data stream unless you pay more money to upgrade the software.

Ex Output:
Negative


Ex Input:
For me, this is pretty much a sure thing. Sometimes I use the rotating beads. Sometimes I don't. It just depends on my mood. The rabbit vibration is stronger when the beads are turned off. The size of the item is pretty long/thick and I do prefer this size to some of the other items I have. My current favorite item. Haven't tested to see if it's waterproof ... too worried that it'll stop working and then I'll be SOL.

Ex Output:

Positive