Adam Carolla was discussing this and, as usual, he made great points.
It pays for itself if you can avoid just one ticket. It would be a perfect gift for anyone who drives a lot, especially on the open road, etc.
I remember I once owned one of these in the early 90s and it would go off every two seconds to the point where I didn't even use it any more, too, to, two annoying. Then you hear all this crap about these detectors don't work because the cop use one band and these store bought models use something else, etc.
I'm thinking I should get one for my trips to Vegas, etc.