Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Great kettle, Weak switch design

I have owned 2 kettles in the past 4 years. The unit worked absolutely great for several months then I noticed the switch would pop-up and stop the kettle after about 10 seconds. So, I would have to hold the switch down for about 15 to 20 seconds then the unit would continue on its own to reach boiling as normal. After about a year or two the switch failed completely. Both kettles failed exactly the same way. I won't buy another one!