I was completely happy vaping KA1 in my DotMod RDA's until I started following
@mikepetro 's thread regarding thermal degradation of VG & PG.
His results convinced me that my preferred style of vaping (below) was very likely to mean I was producing a lot more nasty chemicals in my vape than I needed to.
Dial coil, 2mm ID, 5wraps, 24g KA1, 0.2ohm, 45 watts
Which I chain vaped, taking 1 second draws every 8 seconds (10 - 15 draws then stopped for 2hrs: repeat)
I suspect that my coils were regularly over 500F. Yet everything tasted great and I was enjoying the vape.
These days I'm vaping exclusively in TC:
Dual Coil, 3mm ID, 6wraps, 24g SS316L, 0.14 Ohms, 430F, 100watts (TC is hitting 75watts or so before powering down to regulate).
I'm enjoying the vape just as much but happy in the knowledge my coils aren't exceeding 430F.
I probably wouldn't have bothered with TC if it wasn't for the new science pointing to the extra toxins over 450F or so, but I'm perfectly happy with my TC vape now.
It's a personal choice, but I figure its no real hardship to switch to TC and it might do me some good in the long run.