Have it. The first one I had to return because they have some problems with the charger. They sent me another one right away, so make sure you check the charger right away.
So does it work?? The Zeno did/does seem to make some red spots not erupt as much, or after one spot/zit has lived its life, I use the Zeno occasionally to calm it down.
However, it is really for those kind of zits that are thinking about starting, not ones already there i.e white heads, which is what most of mine are. I don't have the luxury of feeling a bump days in advance and then being able to zap it--I just wake up or come from the gym or even look in the mirror, or these days even BREATHE, and presto--an ugly soon-to-be-whitehead-zit--and the Zeno isn't for those. So I don't really use mine anymore, but I probably should, especially since it cost about 1/3 of my monthly mortgage. I just got too discouraged right away when it didn't prevent everything. I also haven't been very religious about following the instructions either, so that's probably half the problem right there!!!!