I am really pleased with mine. Nothing about it has let me down. The only thing I will say right off the bat is that NO smartphone should cost this price, its just not worth it. I will have to give a lot of consideration to future upgrades now that the bar has been raised.
Anyway, that aside, everything had worked flawlessly, FACE ID is great and all my concerns went away very quickly. Using to for Apple Pay works perfectly and I personally find it a bit easier. The cameras are great, I love portrait mode, but it is noticeably less effective on the from facing camera and looks way less natural. The screen is great and I have kept true tone on, I find it works well and every time I turn it off the whites just look blue and cold. I have turned night shift off as I find its not needed with the true tone display.
Form factor is great and it feels no different size wise to my 7 but finding a way to include reachability was a good call by Apple as getting my thumb across the screen can be a stretch.
The notch is actually a plus point not a negative, as it allows the screen to be BIGGER rather than smaller. If the notch continued right the way along the top of the phone creating a thicker top bezel, you would have to push the signal, battery meter, etc below it, making the usable screen space even smaller. I like it.
All in all very happy, but due to the price I think yearly incremental upgrades at the cost of $1000.00 just won't cut it anymore for me.