Thanks, Jim. Every car my husband and I have owned has kept the cruise speed constant - this is new to me and quite frankly, annoying. I actually took it to the dealer, they said nothing was wrong, and it's been holding speed ever since! Weird.
Re the radar: I think I'm too much of a control freak to ever let the car drive me!!!! I'm an aggressive highway driver so find myself close behind people in the left lane fairly often.