CO and benzene are both smoke byproducts that produce drowsiness. Get either in a high enough dose and you'll go to sleep permanently. Vapor, especially at lower to mid range temps, has little to no toxins and produces a much cleaner high. In almost every case, smokers who try vapor and complain that something is missing, are really only missing byproducts of combustion, and they have nothing to do with the active compounds in cannabis. The exception is that some medical users will miss the few high temp active compounds that have a sedative or analgesic effect. And these you can get, to some extent, by vaping at the high end of the range
I think a vape that pulls hot air downwards through the weed is able to extract a much thicker vape hit than you can get from other designs.
Having recently switched to vaping after 30 years with a bong, I have to say it's an experience everyone should try at least once. Because it does effect the high or stone, many may not like it. If you can't test drive a friends, I suggest a handheld unit (like a vapor genie/vapor buddy style). If you like it, you have a nifty traveling unit, if not, it's only $50 down the drain rather than $150-$500
The up pointing VaporBros was not the problem I was expecting. You pretty much have to blow into the tube to make it spill. Still, I so liked the idea of a down pointing tube that I built a stand propping up the VBs rear end leaving the tube just past horizontal
(something between the Surfer and the Buddah)
More than up/down I found rotating the whip was key. A fixed whip tends towards hot spots, super heating one area of the weed, leaving others untouched.