i have jus a standard detector...it works nicely (cept on lazer ones) the lazer ones don't give off any frequency til they pull the trigger at ur car, an then its too late. but...most of the lazer ones, actually break the lazer, an send back nothing to the radar meaning they don't kno how fast u are going...u can go pick up a cheap one for about 40 bucks from circuit city, an it'll pick up all radars within a certain radius, OR u can get a nice one (around 110++) an it'll only pick up certain frequencies that the good ol po's use now. its been a good investment...i mean if ur doin double the limit, no its not going to save u a lot of the time, but if ur chillin at 10 over, it'll give u PLENTY of warning to step on the brakes easily an not even be noticable that u are slowing down. really...go out an get a cheap one, it'll beep at a lot of things, but u'll figure out when it is a false alarm, an u'll be saved by it a few times. i've been saved by my $40 one about...10 times within a year. so its a good investment...hope i had added some insight.