Not sure I can say I use TC since I am just venturing into trying it. And I don't build, so comments are limited to factory coils. So.........
The only thing I do know, is the trial period is going to stretch out for quite a while. Multiple tanks with multiple coils for each with tons of varying flavors. And when I try a new coil in a tank, I can't bring myself to change it out unless it is virtually unvapeable. At my age, this could last a lifetime.
I'm testing this out with an IPV D2 and Lavabox DNA200. Seems there is enough difference that after a bit of testing, I am now sticking with the Lavabox.
The first try was the Ni200 coil in an Atlantis v1. After a few coils, several flavors, and fiddling with settings, I've decided to eliminate TC on those tanks.
At the same time, I tried Ni200 coils on the Kanger Sub mini. While I had a few flavors that just didn't seem to hold up well, others have worked kinda nice. I have stayed with a Huckleberry Ice Cream flavor at about 460° on 28W. As of now, I could see staying with using the mini running Ni200 coils.
For a while, I have been trying the Herakles Plus with the SS coil, but have only used I Love Donuts juice in it. That is working rather nice at 480° on 40W. I'm running out of that juice, so want to finish it off before changing flavors in the tank. Although the jury may still be out on this set-up, it was good enough that I got 5 more SS coils to continue the testing. Looks promising.
And finally, I just started using a titanium coil in a TFV4 mini. I probably made a bit of a mistake by starting out with a new flavor since I won a 120ml bottle of Cuttwood Boss Reserve and couldn't wait to try it. So far, I've dialed it in at 540° and 68W. I was surprised at ramping up that much higher, but have to say it is not only the best TC vape so far, it matches or exceeds any other set-up I use. It will be hard to put this one down, so will wait until I need to change coils (yes, I will be picking up a 5 pack of these) before trying another flavor. Hands down, my best TC vape.
Sorry for being a bit long-winded, but curious if others have similar or differing experiences.