My iPad Air was laggy and glitched. It rebooted twice in 1 day and diagnostics data had few kernel panics and huge amount of random entries. My iPhone 5c was noticeably slower and laggy. Another iPhone 5S in the house is still on 8 GM as the experience is tolerable there. But even that phone hung 2 times in 1 day. So deciding whether to bring it down to 7.1.2 as well. iOS 8 is a failure. First time I regretted updating to GM. Never happened while updating to newer iOS versions before. Who all done it?