I'll wait for the professional reviews for a truer take on Face ID. They will have had ample time to use Face-ID and also try to trick it. It worked 2nd try during the demo. Seems OK to me. Certainly the early days of Touch ID gen 1 were hardly flawless. New tech is always going to have its glitches even in release hardware. Doesn't matter who the maker is. That said I do think the software might not just be ready for Prime Time and could be an additional reason, other than h/w manufacturing that the phone won't launch until Nov. I say that because from the reports by major outlets like WSJ, their reporters were not allowed to upload their faces during the demo. I get Apple can't let all 600 whatever reporters do this -- not practical. But Apple PR can -- and has in the past -- invited select reporters to a private session to test out new features before they get their review unit to load up the buzz stream with chatter.