I use whisler.The other radar detectors are better! IN my 93 5sd ,It would slowed5 mph instantlythen10 quick.By the second beep!They would be pissed at me. I could see it in some of there faces. Some even prepare to turn around but there radar systems where to slow. Their Alot faster now.And can do more than one rig at a time. they can turn it on and on the fisrt beep, your already been had. Most cop give you time by leaving it on all the time or 2 beeps.I like thoughs cop alot. Thy seemed to like themselfs and other people attitude! YOU can have the best and still get caught. But it is better than nothing.