I've had this product for a few months and have used it repeatedly. It uses a split second of high heat to get rid of the pimple before it gets a chance to erupt, so like another user wrote, it's best to get them when they first start. The little "zap" you get from it is alarming at first but you get used to it after the first or second time. When I see a blemish, I give it a couple of zaps a day and I've either had the pimple completely go away or erupt much faster, hence speeding up the whole zit-red area-tell-tale spot on my face process.