i have the volcano.
it's better for many reasons. first of all, it's designed 10x better than any other vap ive seen out there. it allows you to set the temperature, unlike many other vaporizers (some do though). the vapor is stored in a bag, unlike the rest which you must pull through the tube while it vaps. in the bag, the vapor can stay active for days.
but dont pass it around, you want to take the whole bag.
they do ask way too much for it. i bought one, but i only use it like once per week probably.
