I own two of these cards, just ordered one from amazon to do crossfire in the future.
This graphics card comes on par with the GTX 570 and has a decent go with it. What you get is more video RAM and about the same speed (although the nvidia 570 and radeon 6970 have varied fps on games and who beats who).
Regardless of that, the card overall is robust and comes packaged very well. Sapphire, being one of the best produces of Radeon cards, provide a real bunch of
accesories that come with the 6970. You get a HDMI, some 8 pin extension connectors etc (havent really looked into them yet), DVI-VGA adapter, crossfire bridge, a sapphire gold membership card which provides cool things such as free game downloads etc.
In terms of performance, I've yet to see a game that can push this card, it's a monster and runs very smoothly. Most games I'm running it with stay at 60-65 fps with vsync and if i disable it, it plummets to higher FPS around the 100's with maxed settings and 2560x1440 res.
Black ops - Vsync, 60 fps, disabled, 110 fps
WoW - Vysync, 60+ FPS, disabled, 200 fps.
crysis - Vysync 60 FPS, Disabled, 90 fps.
However the only downside to this card is quite stupid really. Sapphire changed the model, probaby to save costs and the model is not only hideous, but the VGA cooler is way to small for its size. I've considered replacing it but I'm still not sure, considering I haven't even opened the one from amazon yet, I may just test the temps (currently around 38-41 oc idle and 50-55 load).
Overall, good card, cheap for what it provides, although the new design from sapphire does really affect the cooling, especially if you have a system without good airflow.