My experience is different from Karen's. I love the idea of silicone baking products, but I have never found any that actually work as claimed. (Maybe I'm trying the wrong brands?) My food usually sticks to the silicone and, even worse, I don't find the foods to be baked as evenly as with metal (or glass). I have found the silicone muffin pans to be particularly bad. I much prefer a metal muffin pan lined with paper liners. Easy clean up and better end result (for me).
Lisa