Ok so I just took my iphone 5S today. Rushed out to buy this model because I thought iOS 7 is optimized for A7 chip already. However, when I tried to use the phone the sluggish animations still appeared and there are even some glitches when using the multitasking tray. To be honest I felt like I am using an Android phone instead of the golden standard iPhone. One of the bug I can reproduce in every iPhone model is the double status bar: when u are in an app, double click to enter the multitasking tray and then swipe up immediately to close the app, another status bar appears. However, amazing things are the Touch ID app when I could assign my finger as a passcode to unlock my phone, iTunes Radio and Siri. They worked very well especially Siri when she recognized exactly my accent, which did not happen in iOS 6. So I guess 7.0 is just an early stage of the new iOS, and it needs more works to be more polished? What are your thoughts?