Instruct: Classify a given review into positive or negative sentiment.
Query: Durability/longevity an issue

I have tried this model a number of times and have been disappointed in the longevity. Less than 6 months after purchase, the heating pad is no longer working properly. I have had this problem in the past and have contacted Sunbeam previously for replacements. I was hoping the technology had improved to the point where it would be reliable, but sadly, it obviously hasn't. Unfortunately, there aren't a lot of choices in reasonably priced heating pads. Most of the ones I have purchased in the past have had very limited durability. It appears that the controller for the heating pad is at fault. I probably won't be desperate enough to try this one again.