Drove from Chicago to central Illinois and back and saw a few different state troopers either on my side with someone pulled over or on the other side with 2 cars and 2 motorcycles that had pulled over a few cars, and my Bel 795 never warned me-nothing, not even a little flash or sound...other times it would go off in the city and I would see a cop car. Could it be that the state troopers were using instant on or laser and had them off once they pulled someone over? If that's the case there is on point in having a RD, especially at night. Would a whistler 73 or 58 or 1793 have picked something up? I'm coming close to the end for my 1 month return deadline. Not sure if I should return it and try one of the whistlers. Any suggestions are appreciated.