Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Waste of money.

Get real. This gadget does not help in the least bit as far as picture clarity. I wasted my money. The people selling it are probably laughing at all us fools who bought this useless device. Again it does not improve anything or change the picture really at all. Again, don't waste your money. Buy a better TV or HDTV if you want any picture improvement.