I'll have to side with the "cruise control is a benefit" crowd. I use the cruise in city street driving every chance I get, and on the highway when it is appropriate.

I live in Pa-HO-Nix AZ where almost all the roads are flat. If I see a little hill coming up, I usually speed up a tad then kill the cruise right before it starts to try to maintain speed on the hill and I start losing real-time MPG. Then once past the hill on flat road again, I reset the cruise.

I have tried it without the cruise also, and seems like that little computer is better at maintaining a steady speed than my lousy foot.....