On hilly roads, the cruise control tries really hard to maintain your set speed and it's not as smooth as human throttle input. Even the more "advanced" 325i (that my mom has) still accelerates pretty hard to keep a set speed, the throttle comes on like a big surge all at once. Bad for fuel consumption.

Then again, I guess it could be entertaining to feel the turbos and all that torque kicking in.

I like how this thread has gone on for 29 pages.