Instruct: Classify Amazon reviews into positive or negative sentiment
Query: No complaints

What can I really say? This product flat out works, every time! I purchased the original Rat Zapper about two years ago and then upgraded to the ultra last year. The combination of these two devices has resulted in over 30 dead mice/rats in my garage over the last two years. There has only ever been ONE time, ONE TIME that a rat even managed to get out of the zapper. He didn't get away though, he simply managed to stumble out about a foot out of the zapper before he died. He was probably dead before then and the momentum carried him out. In the Zapper's defense, that was a BIG rat, he probably soaked up a lot of electrical current! Anyway, the Zapper costs about $50, I have seen people complain that their zapper lasted a year. Even if that is so, (and my original is still knocking out mice) it's still WELL WORTH IT. If I had to buy a new Zapper for $50 every year, I would do so without thinking twice about it. Long live the Zapper!