The thing that impresses me the most are the tyres, probably the most detailed looking tyres with brake calipers and all that stuff + the tyre rubber texture is so good that it smells rubber. Even the brand name (Dunlop) is visible Also suspension is modelled very well and its movement seems responsive.
The lighting system is ok, but not as polished as it could be. The cars still look cartoonish.
The track have massive amount of details and the sound of the crowd going from your left ear to right ear is a nice touch.