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I just got a 6 this past week and wasn't sure how I would like it because I used my 5s one handed all the time. Now that I've had it for 4 days I can definitely say 4.7" is the perfect size. The only thing I'm still trying to get used to is the larger text size in some apps. But other than that I don't think I'd go back to a 4" screen anytime soon. Plus the 6 with its rounded edges feels amazing in the hand. I'm using one of Apple's silicon cases and its just the perfect amount of grip so it's never sliding out of my hand. The 6 is a fantastic piece of hardware. Now Apple just needs to fix the bugtastic iOS 8.

While I have gotten used to my 6, for some reason my 5s still feels better in my hand. I go back and forth between both phones because it bothers me that a lot of the apps I use are no optimized for the 6/6 Plus screen.
 
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