I've installed it around ten times, due to firmware tests etc. And it has never once gave me problems.
Install chainfire, then go into that to install the driver.
The tablet will reboot, job done.
There is a risk with it of course due to what it actually is.
But it has never caused problems.
Backup with cwm mod first if you are worried mate:-)
One mention though.
If you have already installed the free version, and installed the driver. You will have to revert to the standard driver, and install again if you upgrade to the pro version. As the pro driver has an enhanced driver, called EGL.
All ths can be done via the chainfire menu.
If you need the plugins, give me a shout
These add support for Qualcomm, PowerVR and Tegra.
Sent from my Scroll Excel ICS/GT-I9100 using Tapatalk.