I would give great deference to lawnman3's opinion, since he has probably bought and sold every PV known to man at least three or four times apiece in the classifieds section of this forum.
For now, my favorite is my xhaler. Reasonable price, solid construction, a wealth of battery and atomizer options and mechanical switch make it a winner for me. I have to pull preventive maintenance on the switch, but I'd rather spend five minutes with it, some qtips and noalox, rather than mail it off for a week or two for repair. And I hit mine like a crack pipe.
My adoration, however, is fleeting and fickle, and my opinion may change once my juice box or a mini clone of it being specially made by a modder arrives.
No single unit is perfect. They all have strengths and weaknesses in their design and construction. Furthermore, these tend to be rather subjective, in what I consider to be a benefit may be seen by someone else as a flaw. I'm not going to trash talk other designs, especially ones I've never used. But I know what I have, and what I like about it.
