I did a quick test with the sample level.
It's looking very cool already, but there are some issues on my system:

- shadows are not blurred and thus look very blocky
- resolution change seems to create bugs
- the longer I move around, the more flaws I get. Mainly shadow stripes going into nowhere
- after a few minutes the system hung, and after a few seconds of freeze, A7 closed itself. (no error message, but DirectX device is dead afterwards).

System: Geforce 7900GT, XP, Athlon XP 3500, 2Gig Ram, A7.77.0