Well, I love understeering vehicles like the Enzo. Yes, too much understeer slows down alot, but wrestling a 600hp MR car through the Esses in Suzuka is just pure awesomenes.
Now, most setups released for this car are mainly about reducing its understeering behaviour. So, its maybe the best for someone else, but I don`t get any benifit from such tunes.
And its the same for the 458 (eventhough this car has IMO a pretty neutral behavior). I have a stock one and a fully tuned one. I didn`t touched the suspensions on the latter so far because it already feels so good.