Everything that feels obvious now, once didn't. This goes double for smartphones: All the pinch-to-zoom, touch-friendly interactions we now take for granted and marvel at a two-year-old's ability to figure it out, didn't always seem so natural.
Everything great about the iPhone is even greater here, because big screens rule; 4K video looks incredible; 3D Touch is going to be transformative; #rosegold, y'all
16GB is not enough storage; Battery life is fine, but only that; Touch ID kind of ruins the lockscreen