Nova v2 was the worst tank I've ever owned... delay, then a huge pop and the harshest (painful, unusable) throat hit ever. (on lowest voltage w/ highest resistance head - twist @ 3.2). There were also a lot of times I felt myself inhale hot liquid.
Oh, and there's a rubber piece that is supposed to fit securely against the top of the tank... the only problem it's extremely squishy and pushes to one side, blocking half the airflow and leaves a nice hole for liquid to drip out on the table or in your pocket. Seems like a major design flaw.
To top it all off, a day or two after I got it, it dropped about 3 ft onto hardwood floor. The tube cracked and spilled liquid everywhere. Already bought a metal replacement tank but I'm sure it'll never get used. Bare in mind the way it worked before and after the fall was indifferent... just pointing out how fragile the original tubes are. My other cheap, generic DCT has taken many more falls like a champ.
If my new standard DCT ever breaks I'll probably avoid this one at all cost and go buy some blu cartos at Walgreen's to hold me over. That's how much I loathe this thing.
I really don't understand what people think is so great about this thing. The heads cost the same as a cart so you really don't save a cent. My particular unit was a total waste of money.
But hey... there are a lot of people out there who like these things. Just throwing that out there.