I've had mine a little over a week, came with my vtr. Out of the box, it worked ok, filled it up with Captivape The Good ...., and noticed how much vapor it produced, but also noticed a slightly muted flavor. I let it sit, and wick up, and by the next tank, the flavor was intense. I noticed my juice darkened up quite a bit after being in there for a while, and the flavor started to mute again. Still on my first coil head, and now my juice is almost black, with very little flavor/vapor production and a slight burned taste. Overall, it works ok, I still like my PT2's better (and evod's for that matter), and will be purchasing a PT3 very soon. I started on top coil tanks, and once I bought an EVOD, I never bought another top coil clearo. As far as a top coil design goes, this is the best top coil clearo I've ever encountered, much better than the vision dual coil units I started with in July, but I still love the more substantial flavor I get from bcc's.