Track is great. Glad I read about the solution for the issue I had: coming out of the pits and joining the track, it felt as if I had flatspotted all four tires...really...no fun to drive (tried first with the Caterham and that was just terrible). After changing the values as described in earlier posts, the issue is gone.
One of the best MOD tracks for AC but I had a small problem. I had to set vibration gain/length to 0 in the two asphalt surfaces inside the surfaces.ini file because my wheel was shaking driving in the track like I was in the grass/dirt.