Just to add a couple more points-
Positive-
13.) Reduces GERD (Acid Reflux) if you switch from smoking to vaping.
Negative-
6.) Slightly harder to judge dose vs smoking. (vaping has a slower onset)
*Everything listed is my own experience with vaping*. I get couch lock with excessive use or Indica type herbs. I realize everyone has a different experience in this area, so I will leave it at that.
IMO you can't compare a *quality* vap like the herborizer to a vapor genie. Again this is personal opinion.
"Breathing city may cause cancer. Most good name brands are relatively safe with regard to plastic since the material isn't exposed to high enough heat. Even more so for metal and wood. And some vapes that claim 'glass on glass' don't have an all glass vapor path"
I'm not concerned with the heat. As an example, take a look at the Herbal Aire. The Teflon neck piece is exposed to friction every time you take it off. Overtime this friction has worn away the edges of the neck piece and exposed you to harmful flaked off particles. I agree with the glass on glass statement, I wish I could design my own vap :-)
Still, a glass on glass is better vs other options.
" Slightly less herb used-For some it's a lot less. Some use more vs. smoking (me for one)"
This depends on how efficient your vap is. Again, this is my experience.
"80 percent or more reduction in tar, ash, hydrocarbons, carbon monoxide, ect-I'd like to know where you got the 80% figure. I can guarantee that percentage doesn't apply equally to all the toxins you listed. And ash? Ash, AFAIK, is the product of combustion, not vaporization"
This depends on the amount of heat used. 80% is a good starting estimate in most cases.
"Longer lasting high-Considering that most people associate the effects of the lethargy producing toxins in smoke (CO, benzene, etc.) to be part of the mj high, which generally outlast the THC high, this statement is highly arguable."
Everyone is different. If you expose the herb to less heat then more active compounds are delivered.