After the 4.3 upgrade my tablet became painful ly sluggish. I usually shut down at night while charging. It would sometimes take as long as 10 mins before it was usable! Everything I did seem to take longer than when I first bought it. It was so frustrating. I just got the OTA at 1:30 PM PST. It took only 10 mins. I shut down and timed the reboot time. It now took less that 2 minutes!!! I hope spell the end of this problem.