ive never used anything other that a butane lighter an never had any gaseous problems to be honest with you i think its more of a scam fair enough butane obviously isnt healthy to inhale but its burnt away by the flame. so you would get virtually no bi-products especially if your using zero impurity butane
we make BHO out of it an smoke it so why all the fuss over a bloddy lighter doin its job properly
i think that thost stick thinks would give off more bi-product than gas when burnt they make a better alternaltive than petrol lighters an matches. but to really expect people to replace their butane lghter with this is silly especially as you still need the bloody lighter in the first place to light it.
an if you can really say you can taste the gases in your bong i think your trippin or your lighter is leakin gas cos even if you put a flame to your mouth an suck theres vitually no flavour well not enough to affect the taste of a bong.
i cant see myself or anyone i know ever using those things although it is a nice idea jus not really practical enough
anyway co2 an water has no taste or real smell