I had an iPhone X for 2+ months and still having a hard time adjusting to Face ID. When it works well, the experience is great. You don't even feel like any security mechanism in place. But for the 5-10% of the time that it does not work, it is a frustrating experience. It feels like I am doing a lot of hard work gaining access to my own phone. I understand I might belong to the minority that hates the Face ID since iPhone X devices are selling so well. Anyway, I couldn't take it anymore so I sold it last week and bought an iPhone 8 (my previous phone was a iPhone 6+). I did not go for an iPhone 8+ because I got used to the form factor of iPhone X. My only concern is that in future are we destined to only use FACE ID for all iPhones. Note: I am also perfectly fine with all other new gestures used on iPhone X. I kind of like it but the unlocking mechanism via the face is just so annoying.