Well... I think this is my first post ever, so here goes...
I've only been vaping for about two months... and finally put down the real cigs yesterday. I figured I would share my beginner's experience and my eventual graduation to a Sigelei ZMax V2 with Kanger T3S and Mini Protank clearos.
My wife and I started with the Smoov cig. They were re-chargeable and had small cartomizers on them. I drive a delivery truck for a living and got tired of carrying my juice around for when the carto ran dry. My wife didn't like the cotton taste, so we moved up to a genuine Vision Spinner 400 and the Kanger Mini ProTanks....NOW we were talking.... More juice capacity, more flavor, and longer battery.
However, my battery would die before I was done my work shift, so I started looking at variable power devices that would allow the use of the 18650 batteries.
My wife is happy with the Vision Spinner and even happier now that she has my battery as well, keeping one on charge whilst vaping the other, and I'm happy with a battery that will last almost a full 24 hours.
Now, instead of paying the $2.95 for a replacement coil head for the Kanger tanks, I am buying Kanthal wire and Silica wicks and wrapping my own. Screwed up the first two (shorted out), but have now perfected the art of wrapping 2 ohm coils.
The Kanthal I buy is $2.50 for ten feet, and the 3mm wick is about $3 for about 5 feet. Much cheaper than replacing the whole head.
But as the other pro's here have stated, Kanger's imho are the best clearos out there, and the Vivi-Nova's are probably the best top-coil ones.
I live in the States, so the prices may or may not be the same, but I figured I would just give you my experience starting from the beginning.