Davinci Ascent
Bought it in February 2014 as my first real vaporizer - got sucked into the sexy OLED screen and slick look. Huge oven, provided great taste. Pain in the ass to load but whatever. Two weeks into using it I quit smoking forever, it convinced me to fuck combustion.
Four weeks into ownership on a Thursday evening, the heater cables broke (180-degree swivel hinge + thin wires + heat isn't a good combination). SHIT! I thought, I don't want to go back to smoking while I wait for the warranty replacement!
So in a mad dash, I went online and did some quick research into butane powered vapes (no wires or batteries to break means it'll last forever, right!?!) and purchased the Lotus vaporizer (with overnight shipping) which served me well for many months before I upgraded to my Nano (which still serves me dutifully to this day)