Maybe I'm not that sensitive to it but I haven't noticed any pulsing in tc with the yihi sx 420. It's not their flagship chip but I haven't heard of reviewers mentioning any noticeable variations in tc quality between yihi chips. Just other features like number of wallpapers and things (trivial). I suppose replay can be a nice feature on dna but not sure how useful it is. Maybe it is for some, I've never had that much issue setting tc. Lock the resistance, pick the wattage (or joules in yihi's case) and set the temp. Takes all of 5 seconds.
I got heavy pulsing in tc from the smok alien, a slight amount of pulsing in the istick tc100w, no real noticeable pulsing in the omni chip.
The lower end YIHI chips take some twiddling, but once dialed in get you consistent smooth tc. At least that's been my experience with the SX530.
I have quite a few mods now, (No DNA yet though) For whatever my still noobish observations may be worth:
Few chips do excellent outta the box tc, but some do.
Most chips (including Smoks) can be made to do perfectly usable tc with some twiddling.
Few chips are entirely incapable of perfectly usable tc, but some are. (Aegis Legend and the Pulse dual is pretty bad too)
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DJLSB Vapes does instrument testing for tc and this pretty much goes along with what I see him saying in his reviews, though he probably has somewhat higher standards than I do.
If he says something I have is excellent for tc, it is. 2 minute setup and it does great tc.
If he says something I have is not so great for tc, that usually means I can play with the settings and get at least decent tc out of it. Sometimes he'll give suggestions for how to do that.
If he says something I have is utterly useless in tc, it is. Nothing I do makes any real difference. It's just all over the place and sucks at tc.
What's interesting to me at the moment is that for the first time, his tests say that Smok's new chip does actually excellent tc. Or at least way into the above average range, though his reviewers sample reads resistance a little high. I HAVE to try that out
