Nice game nice demo. My Rating is:

Graphics Level 6/10
Design of the Level 7/10
Charakters 9/10
Weapons 8/10
KI 9/10
Dialoges 9/10
Performance 7/10

All 7/10

The Performance on my Pc is 50-100 fps on 16*AF, 8*AA, sometimes short slowdowns.

Athlon 64 3700+ 2048 MB DDR PC400 Dual Corsair XFX Geforce 7800 GT A6 Commercial 6.4