After starting out with a 401 kit in 2010 that fell apart in a month, it took a year to try ecigs again, with a 510 carto based setup. The chinese menthol was good enough in those cartos to make the switch to vaping immediate and easy. After moving to egos, my first real mod was a Roughstack Maxi, which I loved even though I had to replace the switch every few months.
I danced around with most every type of mod after that, but always on the cheaper side. Wood mods, boxes, silver bullet, lavatube, vmax and mechanicals all got a bit of time. I got used to dealing with stripped connectors, torn insulators, bad buttons, shorts and broken wires.
When the VV chinese mods came out I thought that was great, and pretty much equivalent to a ProVari in performance. The choppy pwm in those mods made my liquids taste burnt and in my case was irritating to my throat. I went back to mechanicals to get cleaner power and durability.
A good friend gifted me his beaten up V2 and I experienced smooth power in a VV device for the first time, and I knew my hunt was over. It continues to get used and abused daily.
Even though I carry my V2 without a backup device fearlessly, I naturally wanted more, so a V1 and 2.5 Ti are also waiting in the wings. You can never have too much of a great thing!