I do enjoy most of the features of the iPhone X, but my biggest complaint is how sensitive the screen is. Every time a finger even slightly brushes it -- like when just laying it down -- the screen awakes and consumes battery power. Also, when in phone contacts it is so easy to accidentally dial someone you didn't mean to.
The screen sensitivity could easily be improved if Apple would give users an option to require two taps to awake the screen, if so desired.
According to the following article, other users have iPhone X features they're not thrilled with, and a suggestion of what one can do to make a correction.