If you're in a legal state, vape pen cartridges are convenient, though they don't give the control that you get with manually operated portable vape unit. They make grabbing a quick toke anywhere dead easy. For a "manually operated" portable electric dab rig, I think it's hard to beat the Mig Vapor Brain Fogger.
As for dry herb, the only really good experience I had with vaping dry herb was years ago at The College of Cannabis Knowledge in Amsterdam, where the guy blew the output of a temperature controlled paint stripper gun into a handful of cheap weed in a glass chamber, blowing the vape into a giant glass ball that looked like the Wicked Witch's crystal ball. After a couple of hits on that I spent the rest of that sunny, fall afternoon wandering around the canals--this at the end of a two week business trip to Germany where I had been tight as a bowstring the whole time. It was therapeutic.
Of course I had to tell that story...
The volcano has a great rep but it is expensive! I've never used one, but the cannabis users at cancer facilities use a volcano, so it must be good.
I have a Mig Vapor Sub-Herb that is supposed to be one of the best portable dry herb vapes, but I have never mastered it. I think it would work best with high quality weed that is finely ground. I'll bet if I played with it more I'd get better at using it. It's so much easier just to vape a little oil, though, and this being a legal stake, great quality, commercially prepared oil is easy to come by.
Tincture and infused oil are even easier on the lungs, but they take an hour or more to arrive. Still, I like edibles.
