I have been using these for about a week with no problems. They help a little with clean up, but you still have grease to clean up for the most part. It keeps things from sticking to the basket, and that is what I wanted them for, plus it protects the non stick finish, so I think it is worth it to use these. I do put enough food in the basket to keep them from blowing up from the fan. I will buy them again.