Hmmmmm. I have a PT3, PT2Mini, and a Davide. Of the three, I like the Davide best, it has an 'airier' draw, and provides a nicer flavor with the same re-wicked heads I use in my ProTanks.
I like the Protank3 the least, and by 'least', I mean 'not at all'. They were a failed attempt at dual coiling with no R&D to test their 'dual stacked coils' concept. I am glad the device takes the original ProTank heads, or I'd be upset.
And right in the middle is the ProTank2 Mini. It breathes well, gives off a nice vape ofrom all of my devices, even the eGo batteries like it. With the small tank, I use it mainly to try new flavors. I commit to one MiniTank before giving a true thumbs up or thumbs down.
The irony is that I picked the Davide up on Black Friday for $10 as a back up, or to gift to someone who might want to start vaping. It was cheap and came in a nice box. No way would I give it away, they can have my PT3 and I will show them how to replace wicks with cotton
