Not saying at all that I'm the perfect driver, but do feel like posted max is there for a reason. Seems like if the posted is 55, folks think that really means 60....65 really means 75. Just seems like having a radar is more like a way to go above the posted speed and lessen the chances of getting caught. I try to stay within whatever the speed for that area is. You betcha there are times I find my foot has gotten heavier, but most of the time I use cruise set at the posted speed. That said, if the posted speed is 60 and virtually all of the traffic in both lanes is at 72 or whatever, I generally try to blend in. Too slow is about as bad as too fast, IMHO.