Here are quotes from 2 of the very first reviews of this device:
"I will admit I have not tried Face ID yet, but it's hard to imagine a facial recognition system that solves the problem of having to carefully aim a phone at your face." - https://arstechnica.com/gadgets/2017/09/face-id-on-the-iphon... "[Face ID] worked the vast majority of times I tried it"... (NOTE: Not ALL the time) - and "...it’s definitely faster than the first generation of Touch ID, though perhaps slightly slower than the second gen." - https://techcrunch.com/2017/10/31/review-the-iphone-x-goes-t...
And while everyone is holding their breath to see if Face ID works, I can see a bigger problem - The lack of a home button is probably the worst design decision. They should have gone with dedicated virtual home button or better yet, stick with the iPhone 7 style home button. iOS 10 and 11 already has too many problems distinguishing between "global gestures" and "application gestures". Half the time when I start scrolling near the bottom of the screen the control center shows up. I'm looking forward to Apple's time being over. They are already obviously struggling to keep their market share because they can't come up with innovations that people actually want.