There are so many positive reviews when they are pretty bad that I thought about the reviews. However, it is possible that people looked at them when they first received them. I found that they worked well in the beginning. After a while a lot of them get twisted and unraveled and the one I'm using looks perfect, actually gives me a little shock when I touch it, and the whole cord is HOT! He burned my leg yesterday when I accidentally stuck it through my knees. Really unsure and crazy how bad it is