Just checked out C4 demo > it doesn't live up to the engine's reputation.

It lagged heavily in most parts. The water shader did not work properly. There were heavy artifacts in the shadows and 300MB+ just for that. God help dial-up users.

If the demo is all that people have to go on before purchasing then i think it is very poor.

I don't think i have a bad graphics card > Ati HD2600 256mb which does have shader model 4, so no idea why the water shader for the C4 demo wasn't working.