I don't like it when an idiot pops over in front of me. But, I actually pay attention to the traffic around me when I'm driving (usually lol!) so when that happens, I just put my foot on the gas to maintain my speed, or slow down more gently, as appropriate.
I don't understand so many people who seem to have the attitude of "if it won't drive 100% for me, exactly the way I would drive myself, then I don't want to use it at all."
I also don't like when I come up behind a slower car, have nowhere to go, and I have to just slow down. You have to actually pay attention and put your foot on the brake then and I don't.
It's six of one, half a dozen of the other. Except, with ACC if I don't pay attention I just end up going slower than I wanted. With regular CC if I don't pay attention, I run into the back of someone...
You picks your poison.