I just wanted to share my awesome experience today! My iPhone 5 running ios 7 suddenly stopped charging - the lightning port didn't work what so ever. That meant that I couldnt restore my iPhone back to iOS 6 before going to the Apple store. Luckily the very friendly people in my local Apple store replaced my phone no questions asked! They assured me that even though I was running an unreleased OS that because it appeared to be a hardware issue it was not a problem replacing it. Just wanted to share my good news with you all as I remember reading about people worried about warranty claims running ios7 beta.