Loved my iPhone X since day 1, I think the most bugging issue I had was closing and switching apps. Got on the first dev Beta of iOS 12 and I'll admit, I'm actually using my phone more then running to my iPad for a lot of things. Now that it's not a headache to get out of apps or accidentally switch into an app off a tap. The Face ID has been a good experience for me, except for day 1. The first day my son unlocked my phone, so I turned off Face ID, restarted my phone and set it back up again and handed it to him, he couldn't do it again. Now what happens is the best way, it actually locks down the phone were I have to put in my passcode after he stares at the screen too long. I have a bug I've reported with some people I get text from, I see the notification but the message isn't in the message app unless I start a new text to that person and then I can see the whole thread but the moment I leave the thread, it goes missing again. The issue doesn't duplicated on my iPad Pro also running Beta or my Macs (one in Mojave and the other still on High Sierra)