Had a thread similar to this but didn't reach a conclusion. Reading these threads can be difficult at times because you hear the negative aspects of so many vapes. At the moment, my portable unit is the Iolite - I've had it for years and it has served well, but I'm a bit tired of how difficult it is to draw on and worry that the rusty residue in the bowl is effecting taste (taste is another negative thing about the IO, tainted with "robot fart" is perfect to describe the taste). I can't help but think this thing could have been vastly improved if the air inlet (wherever it is, it's a mystery) had been much bigger. It feels like trying to drink milkshake through a straw the size of a needle. So I'm after a portable vape with a nice airy draw and reasonable level of discreet appearance - two main requirements. A bonus would be if it didn't need electricity to run, butane is fine. If I do have mains power I would like it to last for a decent amount of time and work while charging. The Solo is a bit less discreet, but I have heard good things about it generally (except it also has draw resistance according to some). The VG, I own, but found I didn't like the feeling/idea of basically breathing in a lighter with every draw. Found myself wishing the stone would stay hot for longer. I was almost sold on the Pinnacle Pro, but then heard so many nightmare stories of melty plastic mouthpieces it put me off. From what I hear, still no improvements made. Also 50 min battery doesn't sound like much. I find myself edging towards the WHISPR 2 (despite moaning about the IO, it still works over 3 years in which says a lot) but I'm not sure if it's a genuine upgrade to the IO or just a gimmick? I'm also not sure if it draws better - if it does, I'm sold. Any opinions on anything to do with this decision would be much appreciated, thanks!!