The Kitkat firmware is available to download at sammobile its 831mb in size.
I have flashed the firmware and its good with some minor changes.
Below are the some changes i have noticed.
1) new lockscreen
2) album art now shown in lockscreen.
3) multi-window added.
4) gps toggle changed with location.
5) multi user support.
6) personal message now shown in lockscreen and its customisable.
7) new type of keyboard.
8) battery performance improved.
Screenshots coming soon.
Sent from my SM-T210 using XDA Free mobile app