We both have iphone 4 and ipad 2. My husband did the new update tonight and ruined his phone and ipad.
What we learned is some phones and ipads did not have enough memory for the new update and it messes up programs and stored items like photos, other issues too, but too technical for me to discuss.
I didn't do the update and the tech advised me not to.
Basically we were told a $600 ipad and $400 phone are pretty much useless now.
The tech said they maybe OK if he goes back to factory settings but he'll lose everything on them. He has the last photos of his parents before they died last year on there.