Graphically, Crusty Demons isn't great, but it isn't bad either. Locations appear large, only to find out that they are fairly restricted when you try to ride down the street and a wall of fire blocks you. Characters and vehicles seem to be really good. Granted I'm not an expert on the Crusty Demons gang, so I can't say how close the artists got to the actual people, but for the most part, the bikes looked fairly solid even though there weren't any name brands.
Sound is okay. The motorbike engines are high-pitched and whiny just like most dirt bikes and the voice acting seems about par for the game. Unfortunately, there isn't any indication in the instruction manual as to whether or not the voices of the Crusty Demons were actually done by the gang members.