Well I got my jb yesterday. Its very smooth. No lag. Other than that nothing special. Battery life still sucks on my OG RAZR.
BB Storm 1: Colossal Failure, Hung it up 06/2009-05/2010
Moto Droid: 05/2010-05/2012, 3 replacements, Greatful retirement
Moto Droid Razr Maxx: 05/2012 - 10/2013, Excellent Experience
Galaxy S4: 10/2013 - Present
After checking here first, I decided to go ahead and accept the OTA upgrade today. Seems like things are working OK so far, but I swear my corporate Exchange now has a permanent search bar at the bottom that it never used to have. Seems pretty useless, as I already have a physical search button on my RAZR (which calls up the same search function), and there seems to be no way to get rid of this dumb thing that's taking up valuable screen space within Exchange. Will post more thoughts after I spend a bit more time with it.