I own an Herbalaire 2.0. It's a very nice herbal vaporizer with cheap replacement parts and attachments. It can be used like a standard Glassware vaporizer like those cheap wooden ones and also can fill up bags of vapor like the overpriced Volcano with the air pump attachment that comes with it.
I have been vaping for around 3 years but I have been using e-cigs for roughly 3 months now, so I am definitely NOT new to vaping at all.
I would never use an herbalaire for my nic juice though... Or even to vape straight tobacco in it (there is still benzene, formaldehyde, and radioactive material in the tobacco even if it isn't combusted) but I use it for my other smokables on a daily basis. I figure that a Vapor Genie, a volcano, and even a globe based vaporizer design would be ineffective for nic juice as well because of the design (an herbalaire would be toast after 1 drop since the heating element is right underneath the herb chamber).
The Iolite however, I have seen it work in NicFitNation's videos on youtube. He said it hits alot harder though which to me sounds like it is burning the base of the juice slightly with all of that butane heat.