Mizuka just bought a CellStar SKY-230DL radar detector. It's amazing. It has a GPS receiver built in. It knows where speed traps are and lets you know 2 km before you get there. (In Japan, we have automated speed traps that take your picture and send you the ticket in the mail.) It also lets you program new information. For the tunnel exit based traps, it lets you know before you enter the tunnel, etc. It also detects police radio and figures out whether they are heading towards you in the same direction or on the other side of the road. It has a variety of special warnings for stealth pulse radar detection, etc. These things have come a long way since the last radar detector I bought. This is a good thing since we're going on a road trip today.
The last time I got a speeding ticket, it was on the way back from the airport. I received a picture in the mail and had to go to the police office. The funny thing was, they suspended my license and then the policeman pulled a map out and showed me where the speed trap that got me was located. He warned me to slow down next time I passed it. ;-)