I've been lucky with iOS8 on my 5S i haven't encountered to many problems since installing it, the only real major problem seems to be with wifi it slow, and some slight lag when scrolling in wallpapers. But countless other have been complaining about alot of other things moreso if you own an ipad which it don't. Now i also have a Moto X & a Samsung Galaxy Tab S, both running Android with the Moto X running Android Kitkat 4.4.4 & there not been a single problem with any bugs at all, that might change when Android L comes along, but in past when a new version of Android comes out the bugs are usually so minor they not worth mentioning and don't effect day to day use of the phone. It seems to me these days iOS is rushed then fixed at a later date but in the meantime people have to put up with problems that effect the use of their tablets and their iPhones plus it also missing features that should have come out when iOS8 launched. iOS7 was just as bad and it took till nearly end of it life to finally get it stable that most people where happy with. Now i don't want the Apple fanboys coming in saying iOS8 is the best ever and trying to defend Apple, what I'm saying as it is now Android is a more stable OS than iOS is and has been like that for the past couple of years now.