It's easier to say what I do like. The main thing however, that I don't like is the screen appearance with the black file boxes becoming grey. Some of the appearance of the icons will also take getting used to. The screen you used to get swiping har left is now accessed by swiping down which is a little difficult as you have to swipe the very top of the screen near the cover! I do like the change in handling iMessages that is an improvement.