After installing 8.4, my entire iTunes library was deleted from my iPhone, so I sent out a tweet to Tim Cook and Eddy Cue in, admittedly, anger. I never thought anything would come of it, until I got a phone call from one of Apple's senior advisers this evening while I was at work. The advisor, Mr. Ruiz, told me that Tim Cook saw my tweet and personally told him to reach out to me to offer help. I told Mr. Ruiz that after messing with my iPhone, I was able to get back the majority of my iTunes library, sans 300-ish songs, which were imported from CDs over the years. He apologized for the troubles the update caused and gave me his contact info to provide him with a follow up, and asked if there was anything Apple could do to fix the problem. I think it's amazing that a simple tweet was seen by Tim Cook, and he personally had an Apple employee give me a call to make sure everything was/is okay. How they got my number from just a simple tweet, I'm not 100% sure, lol. If that's not the best customer service ever, then I don't know what is. fin.