My iPhone install worked just great. Not so with the iPad. Error number 3004. Called AppleCare. Got lots of help, but iPad still in Brick status as of 10:50 p.m. PDT. I am supposed to try again tomorrow and if it doesn't work, I have a case number with AppleCare.
Glad I kept my Kindle. At least I can still read my books.
MacWorld and MacRumors forums have lots
TONS of feedback from people who couldn't finish the install on either the iPhone or iMac.