I have it in my skyline, Got it installed 3 days after I got the car......Makes it so much easier to drive the long trips thats for sure.........got to make sure you get an electornic one, tha vaccum ones a shit!!!......the theory is that with the cruise activated you not doing as much when driving such as looking at the speedo all the time to check your speed cos with the cruise you know its what you set it at hence no looking up and down every few seconds.....
As a truck driver I know that it makes it a hell of alot easier to do the long trips!!!
The one I got on my Skyline is a Command unit and was $700 installed, and has the buttons on the steering wheel....very neat and works very well with no surging and is much better on fuel IMO...