I was disappointed to have updated to Lollipop on my Xperia Z3 recently. Had I known what I know now I would not have updated. I miss the functionality of the power button in Kitkat, to be able to easily put the phone into flight mode without having to swipe the screen. It's easier to press and hold the power button and tap the screen than swipe the screen twice and tap, so I would like the functionality of the power button fully restored. I also would like my live autumn leaves wallpaper restored, which vanished after the update. Also, although the performance is good once Lollipop is loaded, it takes longer to start up. It is disappointing that Android developers have taken away functionality and personalisation in this update, seemingly without regard to the end user.