The DSC/DTC systems are amazing. Had a chance to see exactly how these work at the Performance Center last week. You're driving around on a wet asphalt circle at 20 mph, on just a 335 sedan, not even an M3. Then, when you plant the accelerator with the systems off, the car does not hesitate to go into full washing machine spin cycle, totally spinning you around. And that's at 20. At 70+? Forget it. You're screwed. It's crazy how fast and easy it happens! Then, when they turn the system back on and you plant the accelerator, nothing. It acts like it's going to for just a split second, then just pulls you right out of it.
I'll have mine on for now, thank you very much...