Summary: This game uses StarForce and you can tell from the official and non-official forums this game is full of bugs. No patch has been released to fix some of the issues that have been their since the German release only the 24hrs cars which are great and new StarForce drivers that make it run much slower and take a longer time to check. Many racing leagues are petitioning this product because it failes to provide a Dedicated Server option.
Summary: Don't trust the "professional" review sites and mags for a moment, their reviewers normally test sims as well as arcade games even though they are very different things. This is the easily the best racing game since "Grand Prix Legends (1998)".
Summary: I've been in love with this game since it was release early in germany. So much so, I ordered the German version instead of waiting. If you want a dumbed down racing game you can play with your mates while drunk in front of the TV, look elsewhere. This requires concentration, a good steering wheel, and some degree of real life racing talent to get the best out of. But if you fall for it, eventhe great Gt4 just feels like it has massive chunks missing in the realism dept.