I will say that one thing about the Protank is that it did leak a slight little bit sometimes, and I'm the user who, like many people seem to say they've magically never got an awful tasting device, I'm the user who's magically never experienced much leaking on anything really. But the Protank II is the one device that gave me a bit of sass in that department. The juice seems to gather in the bottom plate like crazy, but the strange thing is that it never wants to wick well enough to give a smooth, moist, flavorful hit. I keep my volts a 3.3, using 2.5 ohm heads. The wicks they use in them IMO just don't soak up liquid well, I've sat there, took the heads apart, kept dripping juice on the ends of the wick, and it takes forever for the wick to pull that juice to the middle, no matter what juice it is.