So the conclusion is...
Meh!
We were led to believe that Apple had really cracked this Facial ID thingy. But it is a V1 release and those of us who have been around a while avoid V1 releases. It may turn out to be better than the technology used in the S8.
I'll be waiting a year at least before even thinking about getting a phone with FacialID tech in it.
All of us who have eschewed the S8 and iPhone X 'upgrades' will be sitting pretty if not a bit smug.
It is still a bit Meh though and you can hold it wrong.