If you have a Note 10.1 2014, Samsung released the KitKat update and it is a big improvement. For me, my bt mouse and keyboard stay connected and are more responsive. Also, it includes the Google launcher (I mainly use Nova). The new wallpaper is nice. And, definitely, my tablet is faster. Compared to the KitKat update on my Note 3, this is much more of an improvement. At this time, I can't comment on the effect on battery life.