cops here use laser and not radar. i can tell you this as my valentine tells me what is being pointed at my car.
and when the laser hits you, it immediately registers your speed. so, no point getting a detector.
all it will do is to tell you, you have been busted.
would let you try it out, but i gave mine to my freind who lives in the states where there are more radar than laser detectors.
save your cash and dont buy one, just drive slower and safer.