i upgraded to IOS 8.02 after doing a search about any outstanding issues and asking a friend who did it on 5S, Ipad AIR, Mini. Didn't have any outstanding issues until I tried to print. i cannot print from any native apps, no 3rd party apps, not through Printer Pro app. I checked for upgrade for HP 3511, a common printer but its up to date, wireless is connected to printer from Airport Express. So we have 4 devices not able to print (Air, Three, 2/5S). i did do a bug report to Apple. The only other issue that is annoying is that I have to do a reset very often to keep things humming, Safari slows WAY down but I do tend to use a lot of apps togetherk cut and paste, pdfs, etc so hoping It will improve with more upgrades as the engineers catch the bugs. I do think I will not be an early adopter again though--wait at least a month, maybe more before installing a firmware upgrade in the future.