I downloaded the GTR Evo track last night; there are three versions included, a full, normal and light version. The full version almost crashed after one lap, but did continue with severe graphic corruptions. The light version works very well, with no framerate hit at all.
The track itself is pretty good! There are some long straights, and the start/finish at the Champ-elysees is very bumpy. Don't let go of your wheel here. The turn into the hairpin at the arc de triomphe is quite challenging and will cause some mayhem at the start I think. There are at least two other points where you will need a very well balanced car.
The AI behaviour is disappointing though, after a few laps in the WTCC Lacetti the AI was 8.6 seconds slower.