Within just a few minutes of use I could tell that the new iPhone X's Face ID was far and away superior to the old unreliable (for me anyway) Touch ID.
Touch ID was extremely fussy in its initial incarnation and a bit slow. Even in its second generation which everyone seemed to rave about, it was sensitive to the slightest bit of moisture on my finger from sweat or from having just washed my hands. And I also had the opposite problem of dry hands. Yes, the second generation did work better and it worked well enough, but I was always conscious of it, always aware of having to wipe my hand first or if my thumb was feeling especially dry to remember to use my index finger--the point being that I always had to think about it, and with all that, it still failed about one time in maybe ten attempts.
Not with Face ID.
It. Just. Works!
It took mere seconds to train the system, and after that it has recognized my face without glasses, with any of my computer, reading, or distance glasses, with my cap or a combination of cap and glasses. It. Just. Works. Which is what I used to expect from Apple.
On the other hand, if I make a face, it's not having it.
For me the most important thing is that I've only been using the iPhone X for a few hours and already I'm not even thinking about Face ID. I'm not thinking about unlocking the phone. It. Just. Works.
Thank you, Apple!