Originally Posted by Danicek 
Hm, I'm playing with acceptable performance with no crashes and with no ini tweaks …
Even the buggiest, slowest game in existance will probably not crash and work OK on someone's system. But there really are a LOT of people having trouble when there shouldn't be any (or at least not many).
Gothic 3 was not ready for release and is suffering bad reviews because of it. Whether it will survive and become something respected like Fallout 2 (also horribly buggy at release) or go down in flames like Darklands (ditto) only time will tell.