I´ve tried out cruise control as well, Hepkat, but I liked the limiter better:
if I want to slow down without braking I just need to raise my foot off the accelerator pedal, which is my natural reaction. If I have cruise control activated, I need to disable it first.
If I have to brake, I want my feet at the pedals. Cruise control would make undisciplined people (read: "ME") place their feet too far away from the brake.
If an emergency arises, I don´t want to have to think through lots of things before I react – I´d rather act according to my instincts. Hence, cruise control is just too much "food for thought" for me and would put me in a situation to which I´m not accustomed.