BMWMAN - check out Radar Roy's $50k challenge to RMR. They won't take him up on it for their $180 unit. Bottom line...junk. I bought a K40 radar detector and laser "diffuser" but I have seen mixed reviews. The radar detector portion is GREAT, but the laser jammer goes off and I haven't been pulled over yet. I can't attest to its performance as it has only gone off as I was doing 80 is a 65mph zone with traffic.

As for radar jammers, it was mentioned that they will land you in jail in the US. That is true. FCC doesn't take kindly to those that actively jam radar. Working for a radar development company (for defense applications), I can say that there are jamming technologies that exist, for a price similar to that of systems on expensive aircraft. If you do find a solution though, I would be interested!!!