I finally got down to New York City today and was able to use the detector. Here's how it went. Heading down the Henry Hudson Parkway, also known as Rt.9A, I began to get speed camera alerts. The readout started at around 400 feet and when it got down to about 100 feet, the chime activated indicating I was at the camera. But, there was no camera! This happened about 3 times as I headed south through the Bronx on this highway. I also got 1 red light warning and at about 100 feet the chime came on indicating I was at the light. Only problem... there are NO lights on this highway. I wonder if the GPS is not very tight on the coordinates and is reading something on side streets near the parkway. It did correctly read 3 red light camera locations once we got into Manhattan.
As we entered Manhattan, the skyscrapers were too much for this unit. It said red light camera ahead and then began the countdown in feet to the location. Only problem was that it was counting UP, not down. It was up to almost 800 feet from 400 when I finally shut it off. I suspect the skyscrapers were preventing a good GPS signal.
So there you have it... several falses on red light and speed camera locations and a few that were dead on. I guess either the database is wrong or it is not very tight on GPS coordination.