I started using clearos back in Dec and loved my stardust. It worked for about three weeks on the first head (and subsequently burned through 2 in a day). I figured I would pick up a vivi nova with my order of 5 more heads for the stardust. They arrived on Thursday, and I have to say that I think I am done with clearos for now. This vivi nova just doesn't work the way I feel like it is supposed to. I haven't had any problems with leaking, but holy dry hits, batman!! If I don't keep it absolutely topped off, it dry hits like crazy. Then there's the incredibly muted flavor issue. I have tried just about everything covered on the forums to fix it. I finally gave in and built my first wick/coil assembly for it this afternoon. It works ALMOST as good as I thought it would with a nice cotton wick and I'm pleased with the way it's working now....but it should work like this out of the box. Now I have a carto tank setup on the way. I hope it works better than these clearos like a lot of people say they do.