Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worse than Useless

I wear a half helmet and I thought this shield would help me get through the winter months.Every time I change lanes (over about 45mph) the thing flips open from the wind when I check my blind spot. Every time. One time it hyperextended when I turned my head back, leaving a gap between the shield and the visor.Also, it doesn't do an adequate job of blocking the wind (again over about 45) to allow me to keep my eyes fully open. Having to wear goggles under it really defeats the purpose.The thing is worse than useless, it is downright dangerous.