Mine got bricked. I initiated the update same as any other, over wi-fi, not plugged into iTunes. Got the message to plug in which was odd, "what if I didn't have iTunes?" I asked. Tried to install update there, then tried to restore. Then made an appointment at my Apple Store (two days cause you can't get same day appointments anymore, Apple is too popular now), then cleaned up and drove over. Waited 2 hours cause no appt, Genius tells me "It's not the download, it's the way things move around during the update, sometimes a file gets misplaced and this happens... but I haven't seen an iPad Pro 9.7 in here for repairs before." He couldn't get the update or restore to stick, "We're gonna have to order a new one since we don't have any in stock. Should be 3-5 days. You'll have to come back and make the exchange at that time."