The layout and subtle and narrow surface of the track makes for an interesting drive, however there are many bugs still pertaining to the collisions. There are some sections around the outside of the tarmac you can fall through, and if you accidentally go off the course in some areas you will get stuck in what looks like grass but acts like quick sand.
I think more invisible barriers would help prevent from falling or getting stuck in quick sand-like grass, if you're unable to fix these issues.