Installed the firmware without any problem on my 650 but after several reboots it didn't show up as described.
The info site showed the old information and a few new buttons on the bottom right side. For whatever reason it didn't worked for my 650 therefore i reinstalled PRS+ which worked fine.
There were no error messages during installation and 650 rebooted as described. So far nothing went wrong except that it didn't seemed to be installed after the reboots.