On A1428, iPhone 5
1- While receiving a call: notice how the green and red button seem a bit burnt to the edges and the middle not as a clean color like you would have when you want to end the call.
2- Also notice in the call Phone app how while in recents while you scroll through the contacts you'll have the names appear behind the status bar.
3- Siri is a bit off, its not as responsive as 6.1.4
4- A bit slow sometimes while going into and out of a folder. Also sometimes while going into the photos app, at the side of the screen you're able to see the home screen for just a second and then it goes back to normal.
5- Major battery drain issue IF you are using the phone, if not it drains at a normal pace.
6- Phone does heat up while using it and charging it which is EXTREMELY different from any previous iOS before.
*PS: for people having apps crash, do realize that most apps are made for iOS6-6.1.4 so not all could function perfectly/properly or for that fact function at all due to the simple fact that none are made for iOS 7 yet.
Please let me know if you faced similar issues from 1-6 or if you've just had one of the issues.