I've not heard this. Clearly, to a new vaper, too much vapour could cause problems.
I don't find them "hot"... which is a fair test (i.m.o.) as I mostly vape on normal kit anyway.
Hmmm, I'll have to reconsider then, but at the moment, the eXpromizer is out of stock in US from what I can tell.Out of mine, a Taifun GT, Kayfun 3.1 and a Kayfun Lite plus and my newest, the Expromiser, it's hands down the expromiser. Easiest to build on and wick, best flavor and overall best vaping experience.
Another vote for the KFL+. I've had mine for about two months (authentic KFL+). Only issue I've had was some leaking from the air hole. Initially I thought it was an o-ring problem, but a buddy showed me that one of the tank rings was cross-threaded, allowing an air leak into the vacuum chamber. The KFL+ has extremely fine threading, so it is easy to cross-thread the parts. I run a single 1.3 ohm microcoil which can be used on a Provari, MVP, or mechanical mod. Extremely cool smooth flavorful vapor. Best tank I've ever owned. Take that back, best juice delivery device I've ever owned, period. Highly recommended.