I find that it is tough to drive the M5 smoothly all the time. I'm talking about the clutch/drive train. You have to really pay attention to not jerk the car front to back when starting or shifting at slow speeds. I had the same problem with my 1997 540i sport. It seems that the weight of the car coupled with the torque, clutch, and windup of the running gear, all combine to challenge your expertise to drive smoothly. I also have a 550 Maranello and it really easy to drive smooth. The clutch is more proportional (not hair trigger) and the driveline is much stiffer. You'd think that with all the resources BMW has at its command they could solve this problem. Oh well.