I've ventured into clearos the last few months having held out due to many "mutes flavor, leaks" comments. I've tried EVODs, T3s, iSmokas and Joye Ego CC/Type A atomizers and Joye wins hands down. Their system is innovative with its top air holes avoiding leaks (though changing large altitudes is a problem with them all) and the Type A atomizer just can't be beat for longevity and flavor. As for ProTank, I'm passing since Kanger has started using only those heads in the EVOD too. They taste like a combo of fish and kerosene to me... though my daugther and grandson don't taste it. The iSmoka is okay but the % of on-receipt replacement duds is too high for me. T3s mini is passable but I don't like the looks of the burled base.