Instruct: Classify Amazon reviews into positive or negative sentiment
Query: terrible design

Don't buy this product, unless your ears are the precise size and shape for this set, it will either be uncomfortable or it will keep falling out. It doesn't go in the ear canal, just sits on top of it. The clip is not adjustable. And the current seller (Tools 247)in the UK won't take it back if you buy it and realize its a bad product. The claim "excellent customer service". That's a lie.