Great for Speed Trap Areas
I'm not a fan of cruise control for resting my feet, but I drive a lot in areas known for having speed traps. I set my cruise control a little below the speed limit when I'm going through these towns and give a little internal wave at the cops lined up along the roads. BTW - this little speed trap fest is starting to encompass most of Texas and is spilling over into Louisiana. I've seen more cops along I-20 the past two years than I have ever seen anywhere else.
I can't help with the installation part, but even at $500 I think my cruise control has helped me to keep my lead foot from costing me at least that much.