Well, I spent yesterday settling up and playing around with my new SG X, and a few first impressions are:
Love Face ID - to me it feels as fast, if not faster than Touch ID.
Non optimized apps - yeah, definitely not a fan of the apps I have that haven’t been updated for the X’s screen, I’d describe this situation being somewhat akin to running an iPhone app on an iPad mini at its’ native size (instead of going with the 2x option).
The notch - it wasn’t, and isn’t a deal breaker for me, but I did notice it every once and awhile. It’s like when you’re watching a movie, or aT V show intently and some noise or movement takes you out of what your viewing briefly, but then after a moment your right back into your content. White/bright backgrounds don’t do the notch any favors imo.
Overall, so far it’s been a great time for me using (playing) around with it. I’d definitely recommend it to anyone wanting to experience what I think is Apple’s vision for the future of the iPhone.