Not bad at all! Especially for a beta! Some of the elevation is way off, and the night lighting could be better, the track is still fairly dark, and for me at least, half of the grid crashes into the pit wall at the start, but this track is very nice to drive, after the start the AI are fun, and it looks great! It feels like a hybrid between what SSR5 looked like in GT2/3 and in GT5, a great balance of classic and new. I think with some work this can be a really good track! Definitely recommend giving it a try. It was one of my favorite tracks in Gran Turismo, and the magic is still there.
All of the optimization are going to come before the final release of the track alongside the physical road mesh. I might be tweaking elevation and road here and there based on feedback received from the testers.