Yeah Iv'e been using it for 2 months with great results over the 325, also seems the 30 awg wire helped eliminate hot spots, a friend of mine just ordered the ceramic for his ZEN I'm hoping to get feedback on that one soon.
I have had my Zenesis for 7 months and absolutly love it. I'm now useing the 500 mesh and it works so much better than the 325 also switched to the 30 awg wire and way less hot spot issues.