I think a lot of naysayers should give it a real shot before criticizing. I was a big naysayer, then I finally decided to try it out a couple of days ago when the X was in stock at my local Best Buy. Many of my complaints about Touch ID being more convenient ended up being mitigated by the fact that Face ID works REALLY well at a LOT of angles. I already had an angled stand on my desk and to be able to literally glance with my eyes at the phone when a notification lights it up, and see the notification reveal itself - that's just plain awesome.
That said, there is one situation causing me problems, and might even be a deal killer since it's a regular daily part of my life - sunglasses. I wear them, a lot (when I'm not at my desk). To get it to work with sunglasses you either have to have lighter sunglasses where your eyes are relatively visible, or you have to turn off the "Require Attention" option so it doesn't require your eyes looking at it. When I turn that off, it quickly learned my face with sunglasses on. But I don't want that turned off as it's slightly less secure and gives me less control over the unlocking process.
This is a problem in the car as well where I pretty much always have sunglasses on. That's the one place where it needs to be as convenient as possible. Yes, I look at my phone in the car. It controls what I listen to and it's no different than looking down to change the radio station on my dash. I will also read and occasionally respond to a text, especially from my wife, at a stop light (*gasp*).
Touch ID also seems to be a bit faster overall as well. But Face ID saves you the "trouble" of having to do an extra gesture to touch a button. It sounds silly, but it's pretty slick.
Point being, Face ID is really freakin' cool and generally speaking works great. However, it loses a bit of the pragmatism that comes with the mature, speedy, and practical Touch ID.
And 6 pages into a MR post, there's no way my entire comment will be read...
