Loads of potential but needs more work.
The racing line has a very harsh edge and rubbering in doesn't look very good, some of the kerbing seems overly high on some corners, the AI are very twitchy and dangerous to be on circuit with and they don't take particularly good lines.
The road detail is really nice, lots of surface undulations and bouncy sections which seems to be true of the actual course. A clean lap in a GT3 car will be around 2:06 or so which seems accurate to the real thing as well. Trackside details are nice but some of the sections on the barriers are just grey where they are painted blue and white on the actual circuit and can make spotting braking zones, especially on the final corner a little hard to pin down.
I hope the author eventually gets this to V1.0 because it will be a fantastic version of the track with a bit more cleaning up. Lots of fun to drive on as it is, but you'll probably need to stick to using it in multiplayer for now. :)