Instruct: Classify a given review into positive or negative sentiment.
Query: Don't waste your money

First and foremost, this product does not do what it is advertized to do. The software did not install at all. I had to go to their website and download the latest software and diagnostics. And I spent far too much time trying to just get the software up and running. Second, the item did NOT measure any contrast on my LCD monitor. When I called tech support, which did call back the next day, they said it is common for contrast to not be properly read on LCD monitors and to use the default contrast setting. Huh? He then tried to talk me into upgrading to the Display 2, which has a lot more functionality, for $99 but he thought he could get me 25% off. I thought they should have given me a much better deal than that to compensate me for a product that did not work as advertized. I sent this back and hope I get my money back. It is NOT worth your $$$; spend it on something else.