Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Have Not Experienced Any Benefits

Yes, they do look kind of cool. However, don't fall for the hype. After a month of wear, I have neither experienced any mitigation in aches and pains nor noticed any increase in calm. Save your 20 dollars and buy a bottle of aspirin and a couple of beers. If you must buy one, do not buy one with a white band on it. It becomes dirty looking very quickly.