The iOS update hosed my iPad Pro (9") model leaving me with a prompt to plug it into a computer with iTunes. I'd call that a FAILURE for an OTA update. I'm not sure how my iPhone 6s Plus will turn out.
My iPhone 6s Plus came out okay.
Yep, same here (9.7" iPad Pro). Can't restore from iTunes either. Completely fails. The 12.9" iPad Pro is fine, as is the iPhone 6S Plus. Another quality firmware release, clearly.
Mart