I've had my X for 3 days now, and I still have TT on. It looked too yellowish at first, but I've gotten used to it, but I can't say that I love it. A big consideration is that while at home, I switch around between my MBP, iPad Air2, and iPhone 6 Plus, all of which don't have TT. Going from those devices back to the X is jarring and takes a little while to readjust. I will probably try switching the X's TT off just for consistency's sake.