I personally watch way ahead of me and look at my rear view mirror every 5-10 seconds (habit) to watch the road. I dont speed crazy maybe 15mph over but hey it is enough to get me a ticket so i watch it carefully. I never had one and don't want one because it makes me feel like i am trying to fool the officers and i have ton of respect to law and officers. However i have a few friends who swears that radar detector saved them countless times.