I had high hopes for this product and when you consider the price I thought for sure it would be a life saver. The product promises to use heat therapy to reduce the size of the pimple and that anti-bacterial effect of the heat kills the pimple and prevents other ones from occurring. It's the same principle as the devices professionals use during a facial treatment. It does not however work on all kids of pimples (they do state this in the fine print). It's best for those under the skin, cystic type of pimples before they have full surfaced. Even so, while it mildly shrunk the size of the pimple (which may have occurred anyway) it does leave a visible red mark that took days to subside. It's not worth the money as far as I am concerned but luckily I bought it at Shoppers Drug Mart and they fully refunded my money. I have yet to find a silver bullet to fight those nasty cystic pimples and Zeno is now officially crossed off my list to try.