It sure as hell was a mistake for me...ive been trying to update all day...ive had like 2 failed attempts...first I installed the 1st update TWICE...which added extra to the OTHER STORAGE..which caused me too delete mostly all my apps to free up space to get the 2nd final update...THEN...When I was about done at 96% It started over again because there was no space...I finally did it again and finished the 2nd update...and its stuck in the spinning gears now...
Moved to two phones here (521 then a 925) on the very first day right @ 07:30
The 521 was hard reset just for grins to see how recovery and resetting would go ... very easy with a backed up account.
The 925 hasn't been hard reset just one soft reset due to a problem unrelated to 8.1
Maybe just lucky I don't see any screwiness or any changes that I absolutely dislike.
Too many good things for the adventurous!