Apple has since pulled the update, but if you already updated an iPhone 6 or 6+ you are SOL until they release a fixed version. The update knocked out cell service and TouchID. http://www.theverge.com/2014/9/24/6839235/apple-ios-8-0-1-released
I did as I was in the middle of setting up my 6+,truly gutted as can't get either the apple reset process or a 3rd party firmware to work and solve the problem.Apple have truly ballsed this up,I can't believe a catastrophic bug like this got through their stringent testing process.
Not particularly pleased with iOS 8 vanilla on my iPad 4. They slowed down the animations for exiting/launching apps, so everything feels more sluggish. Also the changes to Photos is bizarre.
I hear ya, but they'll probably fix their issues very soon. Always bugs to work out. And in this case, there seems to be lots of 'em, I'll tell ya what!