I had a chance to go ahead and upgrade my old 5S. Since picking it up I've had about a week or two of playing around with the camera.
Straight out the box I was blown away by the 5.5 inch Retina display coming from a smaller 4 inch LCD in my 5S, which was replaced with an aftermarket LCD so the contrast was way off lol which made it even worse.
The sleek almost secret agent level cool casing is better than it's ever been. I wanted a black phone and I opted for the Matte Black because I know I won't be able to keep that beautiful Jet Black clean at all.
Internally the A10 chip handle everything I threw at it perfectly, I also tried out the new and exclusive to the 7plus "portrait mode" and I must say after all of the hype. It has not proven to be too big of a deal for me. I'm more impressed with the dual lens setup when zooming. It has built in optical image stabilization and that makes the 4K video it produces look amazing.
Not to say that it isn't cool because it is but it seems like more of an effect rather than a real kind of depth. Keep in mind, I'm a photographer, I might just be more sensitive to it.
All in all, I love it. Apple did great once again!