It worked great for me..
In fact, I didn't know about this driver, and installed 12.6 BETA back then, and despite it properly setted up my screen resolution, didn't show me the complete menu on Catalyst, denying me the possibility of scaling one of my screens.
Once I installed, everything worked fine. Complete menu, including the Scaling option.. 
But, I deleted W8 because I think it sucks. I had to intall audio drivers (X-Fi Xtreme Music card) everytime I boot..
... But that's another point.. 
Best regards.. 
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8320 @ 4,5 / 990FXA UD5 / 7950 @ 1150-6200 / Switch 810 / H80 / 16 GB RAM / 23" 5760x1080 / SSD 64GB RAID0 / Tr2 750W