If you have ComicZeal, or PDF Readers, or pretty much any app that uses Apple's distinguished mentally-challenged filesharing, prepare to just restore, because that backup is going to take you upwards of 24 hours (!) according to various forums, if you have files stored in them. iTunes locked up on me 3 times trying to cancel out of the backup and I had to task manager out of it. So now I have to go through all the bullshit of loading files back into every single app, and I've lost all game saves, etc. The iPad has been great, but everything connected with it software-wise has just been a miserable experience which sucks every last drop of fun out of owning one.