I couldn't be happier with it.
I'm not a particularly fast driver. Many in my family say I drive too slowly, but I do drive alot of country back roads that have become aggressively enforced over the last year. With the dip in economy and the loss of revenue to local governments...apparently traffic safety has never been more important...and profitable.
I've seen on county roads motorcycle police standing in the middle of the road with a radar gun with chase cars on the radio nearby to pull over cars that come down a hill too fast. I figured I may as well even the score and just be warned of speed traps before I come up on them. I don't know if it has saved me from a ticket thus far but I have successfully been warned of law enforcement well before I could've seen them with the naked eye. This happens on a daily basis.
One thing that has surprised me is that I've come to find out there are more speed traps than I was ever aware of. Now when I see certain bands of radar being detected I look all around trying to find them. I've found them in places I pass by all the time, but they were hidden away unknown to me. It's become a game of "find the cop".
I think cars should come standard with them frankly (yes, I'm aware that they are illegal in Virginia and the District of Columbia) as they make you more aware of your speed. It could be argued that I drive closer to the speed limit now as I have a constant reminer of potential enforcement right there on the dash.
It has become little more than a game in the car than it has been getting away with anything, but I am enjoying it. If you've considered getting one I would recommend it. I may write more later on which model I'm using if anyone shows any interest.