I've tried AOD 4 times (or rather >4 times but for 4 specific needs). I've successfully accomplished what I wanted to accomplish 0 times. I have been 'hung up on' 3 times, abandoned after "give me a few minutes" twice (defined by me as the agent still being 'conected' but not responsive for >45 minutes), and been given a scary-vague non-answer that prompted an in person visit to the airport the day before travel (along the lines of "not only can't I do the simple thing you're asking me to do, but you should get to the airport extra early in case there are more problems with your reservation")

I would stand in a mile long line for a face-to-face human before I wasted any more time with AOD.