I bought a DNA mod not because it was DNA, but because it was the smallest single 18650 mod I could find. I no longer do TC, but when I did it on the DNA, I felt I could trust the temps were accurate (fyi- temp readings weren't that close to some cheaper mods I have) I quit bothering with it because I found that with my wattage/style, I never hit the more "dangerous" temps. And because I frequently change power depending on my mood- I start every day at about 8W in the am, and bump it throughout the day up to 9-11W - doing TC was a little too high-maintenance for me.
But whether you use TC or not, it's nice to know you have what's widely considered the highest quality board on the market - especially considering what a battery can do to you (and what you keep in your pants) if it's not managed properly. And I trust mine to charge on-board, just as much as I trust my Nitecore, so that's an added advantage (I still don't completely trust the batteries, though, so never unattended).
I do use other mods, so I'm definitely not shilling for DNA, but there are factors other than the actual vape quality it delivers to consider. I mean- hey, with all its other capabilities, I can't believe it doesn't have an on-board puff count reset, and other features cheaper boards offer! I'm not on-board with Replay yet, but if it, or its successor, nails consistency, I'm all for it. I no longer miss smoking, but I do miss the consistency & predictability of hitting a cigarette. Let the vape do the same thing every time, and let me adjust with the way I hit it - that's what I'd like.
Also, what
@ShowerHead said.