The radar companies sell detectors to us and guns to the police, with a gap between, so you get state of the art detector and 6-12 months later police get something to beat it and the cycle continues. I have chosen not to play that expensive game and to study my route so that I don't get tkts too often. I've been taking same route to work for about 5 years and I get stopped about 1-2 times a year and get tkts about 1 every 2 years or so.