Well kit kat is fast I will give it that! Only had it an hour. my phone was 100% charged and plugged in during update now it's dropped to 90% so looks like battery is draining much faster for now but I will give it a few days for the battery to settle with the new os and it should improve. Nothing much to show on the outside apart from the notification bar, all icons are now white and the bar itself is transparent
a few tweaks on the swipe lock screen but nothing special. I know 99% of the changes are under the hood and hopefully these will make my phone the best thing since sliced bread ( what was the best thing before slice bread? ) anyway so far so good! lots of playing to be done