I'm having a blast using it, the only mods I have done are Full Customizable Suspension and Medium Racing tire. I posted this on another thread (about a RUF '86GTR), but there is no reason why I shouldn't post it here as well.
The rear toe and camber settings were a major improvement in control. The car is incredibly fun to drive, no longer on a razors edge ALL THE TIME. It takes some practice, I actually spent a few hours just beating it on Eiger lap after lap today. I also thought I would NEVER be using it for competition, but I tried and easily won a few Professional Events (Turbo and German Make races) with it. (easy $36k for the High Speed Ring Turbo race, lapping around 1:09, 3 lap race)
It's far from complete, especially if I add more power mods. I'm just modding it and driving it a step at a time.
If it's not your thing I understand, but once you kinda get the hang of driving it, it's VERY satisfying. Please share your thoughts or suggestions!