I have used these plates for many years and I attest that they work. They do not work instantly. They are not magical. i think the best test for sceptics is to place the large plate in your refrigerator. Within three days the refrigerator will be much colder and you may need to raise the dial. You can use any size plate or disc for this experiment but the smaller ones take a little more time. I do think they are high priced and I do think anyone purchasing one should search the internet for the best deal. The real ones have an EIP stamped on them. The discs are smaller than shown and I think the sellers need to show them actual size. They do somehow help burns and wounds heal faster but not immediately. Ihere is a Linda Goodman "knowflake" forum that discusses them in depth. Mine have disappeared on their own as well. I would not believe it if it hadn't happened to me. Everyone's reactions will be different.