So I just installed iOS 9 directly over the air, and whole the install itself seemed to go flawlessly, it had this very weird behavior of it getting "stuck" or whatnot whe I tried to click Continue after it saying things like Your iPad Was Updated Successfully etc. - The initial post install setup process. It's like it froze after I clicked the buttons on screen and it wouldn't respond to any more touch input. So I had to keep sleeping the screen with the top button then waking the screen agai to reset the process and then it finally went through, and I'm typing on it now. Did anyone else experience this? Did something go awry with my install? Is this nothing to worry about?