I got this product today, and used it immediately. I was out tonight, and when I was washing my face before bed, I saw that the pimples I had treated earlier were already reduced in size by about 50%. I read on the zeno website to treat zits about 3 times a day, if it's a persistent zit. Sadly, I couldn't do this because the battery died on me. Before you buy this, stock up on your doubles As!