I used to have a bad habit of speeding on the highways. Yes, I'll admit it. I have no patience when it comes to driving. Even though times have changed for me and I now drive a a safer limit, radar detectors are still a big hit with a lot of people for keeping yourself in check when it comes to speeding.
If you're interested in keeping your speed in check, you may want to check with Escort Radar to see what they have to offer. If you do however, make sure you know your states laws. Many states no longer allow even the slightest hint of a radar detector. I know Kansas is one of them and I certainly won't risk it. Military bases are another. So check your laws before you consider purchasing one.