i'm using the case-mate tough case, i also had a seidio surface & OB defender.. all good cases but i use the case-mate most of the time... feels good in my hand w/ little bulk added, the seidio surface case w/ metal kickstand is great for watching videos plus it's not a lint magnetic..the OB...
it happen to me yesterday... unplugged the phone @ 6am by 7:30am i was @ 65% without touching the phone...i spoke to a att agent via live chat, there sending me a replacement within 6 business days....*fingers crossed*
i got the pop up message @ work and it wouldn't DL until i used my wifi @ home... so far so good... i left it on wifi steaming pandora hasn't lost signal in 1hour....
my third day w/ HOX and i'm getting 15hrs of middle usage... mainly voice calls/text,yelp check ins,gmail push,pandora,google+ some temple run,angry birds,pew pew i'm loving the battery life so far...:)
i'm not sure how much thinner the surface case vs. the active but i didn't consider the surface case because i like my volume rocker and power buttons covered, the surface case is cut to expose the buttons... after a few days with my active case i love it, alot thinner then otterbox plus it...