I've got a V1, and notice actually a pretty even spread of the radar guns. The cops in New Brunswick almost all use a K band gun, state troopers are steadily mixed between X's and Ka guns.
Laser has actually been illegal to obtain speed in NJ until very recently. Now I think there's 10 units in patrol on the GSP, which I've yet to be hit by. Most of the cops are using good ol' reliable Stalker units.
State Troopers are getting sneakier and sneakier though. They're now hiding in known false areas, aka Exit ramp 14 of the Turnpike, or others. So if you don't have a Passport 8500, or a V1, you're pretty screwed.
Also forget the instant-on crap. If you catch one in a bad mood, they'll sit on the side of the road behind a bush, and wait until they see someone speeding to turn on their units. So if no one in front of you is speeding (at least 10 over in most areas) and you pass the cop at 90, you're screwed, radar detector or not.
