Iphone 6 beats the hell out of all competitors in terms of sheer performance.Smooth performance when compared to iPhone 5S or other Android Devices. iOS 8.0 having some bugs hope it will fixed by Apple in upcoming updates 8.3.
Battery backup is also quite good when using 3G.The metal body gives a rich look. It has 8 megapixel rear camera with some new features like time lapse, fast motion.etc.
It has a big screen so just difficult to deal with thump on top Back button on screen. But we double tap on Touch ID screen will coming down so it is good option to use.Overall it is a great product from Apple.
If you are an apple user(5s or 4s) time to upgrade to iphone 6.