I disagree...I think it looks absolutely horrid on this phone. Even in areas that do not have a warm feeling it's still a fairly piss color yellow!
To me it's just a real ugly looking feature, you want something easy on your eyes lower the brightness, instead of making your screen look basically a warm yellow.
I've tried it on mine, my fathers, and the ones in the Apple store and all look to be that aggressive yellow. Even if they lowered the aggression of the feature I'd never use it.
I like my brightness to be somewhere in the range of 60-70% and for my screen to exhibit deep blacks with a cool white look coming from whites. Essentially I have that with my 2nd X after returning the first model. All in all there's a huge inconsistency with the X at the moment if you have super sensitive eyes as I do, I notice stuff like that with phones as soon as I view the screen for a few minutes, sometimes as soon as the splash screen.
There's no work around, your screen is either...
A-really warm with yellow tones
B-less warm with pale yellow tones
C-or classic oled with a cooler color temp and a whiter tone...can actually vary between pinkish white, bluish white, or stark white.
My first x was B, while me second is C with whites looking fairly white with a very slight hint of blue when tilted back and fourth.