I have yet to try it, but have been asking around a lot lately. Here's the info i gathered from about 10 subjects, this is the general opinion.

General vaporizers:
-A vaporizer is great, but you don't get the taste.
-You get quite high, it's very efficient

Volcano compared to other vaporizers:
-Way better, get way higher
-Get the nice taste of the ganja, really swell
-Oh my god i am so high my face is numb(2 independent subjects said this).


Go for the volcano!