Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Absolutely useless!

Shorter version: You'd be better off blowing the dust off your keyboard just as you would blow out candles on a birthday cake.Longer version: This product does not work as described. After reading the other reviews here I threw caution to the wind and decided to give it a shot. I conducted four tests for this product. First, I tried sucking up dust particles that were on my keyboard tray. The product failed to move the dust particles in any discernible manner. Second, I tried sucking up a stray hair on the tray. It failed once again. Third, I tried sucking up a small nail clipping. Failed. Fourth and finally, I tried sucking up some small crumbs. Failed, failed, failed. Although I could have kept testing the product on the variety of other small particles around my desk, my patience had worn as thin as the layer of dust I had tried to vacuum up - there was no way the product could move me to pity it, just as it could not move that dust.Needless to say, I am returning it ASAP.