Instruct: Classify a review as either positive or negative.
Query: Great until it fails

I have now owned three of these and love them as long as they work. Unfortunately two of them have failed, the last after just a couple of months. In each case the switching mechanism failed, making it impossible to use. The third pot, which has not failed, I think may be protected by the fact that I use it much less as it is in a second home. I won't buy another.