I recently purchased a Zeno- but I returned it within two weeks. I'm not going to say the product didn't work completely, but I will say that it wasn't for me. It did burn your skin- but that was the point- the heat was supposed to kill the bacteria (though without leaving permanent marks.) I found though that I didn't think it did much for the acne on my face, even the ones I thought it was really targeted to get rid of (the ones that hadn't popped up yet). I did use it on one on another area of my body and it was gone within just one day so I may have been using it on the wrong type of blemish. But overall, its a lot of money for a mediocre product. If you really want to try it go for it, there are consumer reviews that rave about it (which is what sucked me in in the first place)- but keep the receipt and original packaging- just in case.