I had used Zeno in the past to treat my acne. I had bought it on sale at Rite Aid for less than half the regular price. The Zeno system is easy to use, you apply the tip directly to the location of the pimple and the Zeno will apply heat for a couple of minutes. I really liked this concept because this is an acne treatment that does not involve any use of harsh chemicals. From my experiences with the Zeno, I can say it works ok, but it is definitely not with the price I paid for or even the regular retail price. I believe that it works best on small pimples and newly forming pimples. It did not work well on pimples that were already medium or large in size. I was surprised when I started getting new pimples popping up in the places where I had treated my face with the Zeno. I think this may be due to the either the bacteria or oil becoming trapped in the pores when the Zeno tip is placed on the skin or the Zeno is not becoming hot enough to sufficiently kill the bacteria. Overall, the idea of using heat to treat pimples is not new and I can get better results using warm water and cotton balls and applying it to my inflamed pimples.