I havent used a volcano, but Steven Haggor (former 20 yr editor of high times) told me that they are the best option because they regulate the heating of the bud and you get nothing but vapor (if you hit to hard on vapor bros style vapes you can ignite the bud and get smoke).

That could have happened though when you sampled, you see you can take HUGE amounts of vapor but you cant take HUGE amounts of smoke with out it burning your throat and tasting like shit (at least out of a vaporizor).

I have a vapor bros. vaporizor and I love it. Its definately something that requires a little bit of finess. It DOES ignite if you have the heat too high or the bud is too finely broken up, but if you use it long enough to know what you're doing you can do interesting things.

such as...
load most of the bowl with your bud picked apart to a leafy consistancy (big enough for air pockets but creates a surface) and sprikle kief on top, very very very gently toke for a long time (watching the glass if it gets too thick with vapor back off the hit because its about to smoke - smoke HURTS and ruins the taste for the rest of the bowl) and you will get an EXTRA minty flavor plus be pretty much full on stoned off of that one hit.

another option....

you must have a sphearical mouth piece (not flat) but you can put your mouth piece into a bong (where the bowl would go) and drag through the bong for an even BIGGER cooled hit.

for me the biggest draw of a vaporizor is TASTE. you can taste the orange in a orange krush, the sweet/sour of grapefruit and the minty flavor of anything that is trichrome heavy. If you're lucky enough to have several strains then you really get the pleasure of noticing the differences in all of the bud.