I use it all of the time, well 95% of the time. Our last few cars came with standard CC, the latest has Radar too. While you can select normal CC I use the radar on all trips. It will stop the car, not quite as smoothly as I do but close if the car in front stops. As has been said it's good for economy, and enables me to keep a close watch on hazards rather than the speedo, so preserving my licence, as well as making me safer in traffic, because I'm looking up 100% of the time.
A touch on some steering wheel buttons engages/disengages/adjusts the control, as does a touch on the brakes. Nothing to dislike in my book, after all it's not compulsory to use it.