Not bad tbh, the biggest thing I've found is that even with the traction control off the esp still cuts in which is a pain in the rectum.
Other then that it's pretty good. A lot depends on how far you go with mods obviously. I've got the forge baffled sump as a precaution and also a 10 row oil cooler plus the oem oil heat exchanger from a B5 S4 which itself gets temps up quicker and in theory should get them down quicker as well. Highest temp I saw at the ring iirc was about 121 C.
Standard brembo discs with ds2500s stood up well for the first few laps at the nurburgring but I think on one lap there was a big queue to get off so couldn't cool the brakes down enough which led to deposits and vibrations. Subsequently used carbotech xp10 at castle Combe with no issues but the screeching at low speed was driving the mrs potty. More potty then normal I should say!
What I've now done is fit TT RS cooling ducts and just bought some more ds2500s so will see how that works out.