My only Cruise Control-experiences I've made in 1993, at my autodriveway-trip across the USA.
http://imageshack.us/g/33/img3510i.jpg/
And the 2008 Chrysler Town & Country, we had at our East Coast-tip in 2008, had a CC, too, my my wife drove it, not me.
In Germany Cruise Control-systems are not very common, usually only at bigger premium class cars. Or -surely- at US cars.
For a long time I thought, that it's only possible at cars with automatic transmission, but this was not correct. Also cars with stick shift-gearing have that, for example the 2000 Opel Astra G of my parents-in-law.
Though it's not always needed here, because of the traffic situation, it's a comfortable extra. It avoids pain - when I'm driving long distances, consitently on the Autobahn, after ca.500 km I got a strong pain in my right knee.
It ws really bad on the way back from my Sweden-trip in 1999, the 1500 km back home I've made with just one overnight stay after 1000 km at my grandmother nearby Flensburg. 200 km later, around Bremen (300 km before home), I've felt the pain coming. In Münster, 100 km further, I had problems to move the leg. And at home in Dortmund, where I lived back then, it was so bd, that I couldn't take the 5 steps up to my apartment. I've climbed upwards like a 90-year-old grandfather, dragging myself at the handrail.
At the trip in 1993, the redmetallic Buick was really lame, but the most comfortable to drive with Cruise Control. I could put my legs on the dashboard. Which has caused irritated views from the other drivers.
But a Cruise Control can be dangerous, too. It redcuces the driver's attention and supports drowsiness.