I upgraded to 8.1 and decided to do a COMPLETE factory setting reformat to get back to Win8. Lack of support for 8.1 caused this decision, not to mention the "Windows button" coming back completely flopped. Obviously Windows didn't understand the outcry for that button to be back. We didn't want to go back to the Windows 8 start screen; we wanted the original layout.
-_-
Iobit has my vote.
Regardless of what's above, I find Windows 8 to be a pretty great OS. It took some getting used to, I'll admit, but just like any human, we're unaccustomed to change.