Bests & Worsts Reviews from Amazon

I have purchased this product twice because I liked the shocking function but both times the product has broke after a short period of time. As a mechatronics engineer who has taken the unit apart, it is a poorly designed and that has caused it to be prone to breaking. But I give them credit, when it works, its a great concept. They said they would get a replacement unit to me, but 6 weeks later, I still have not received a replacement unit despite checking in with them every week. Given the price and emptiness of their warranty, I would advise against purchasing this product.