Well if I am allowed to give a subject opinion, this mod changes assetto corsa. I along spent over 90 hours on this game just hotlapping the RSR with this mod. The new patch is more accurate, especially the internal sound. My friend even failed my double-blind test when trying to identify the mod sound from a real life onboard footage. XD It is THAT good.
However, there are sill two issues I would like to point out. First is that at lower rev range the engine sounds a little bit "electronic". Please see
https://www.youtube.com/watch?v=JKTLxp6RSbo&t=629s. This is a footage of the RSR at Sebring 12hrs.
The second is about the external sound. Well, how do I put it, I feel it lacks just a little bit "visceralness" compared to the real one. Please this video:
https://www.youtube.com/watch?v=DPGr1K5acjk&t=138s
The new external sound is like a beautiful melody, but I think it is not "brutal" enough.