3 Stars for the effort, but IMHO it isn't nowhere near the quality of the original KS version of Spa Francorchamps (or the "Spa_Revised 2.6" mod).
The textures and colors/pallete are off (way too saturated), there are some ugly seams near the curbs and grass, and the asphalt textures look way too dark and undetailed ("flat"), like rubber.
The final nail in the coffin (and a nasty one) is that it breaks the original KS (and also the 2019 revised version) of Spa, by replacing the lovely original textures with the new (IMO, inferior) ones from this mod.
This is a huge no-no for modding standards.
Very messy, unless you use a mod manager and wish to keep details of the different Spa track versions untouched.
Especially if you race online, the swap on/off track installation gimnastics becomes a must before joining a server hosting this (only reason I got to this mod).