My once trusty Garmin had usually be correct when giving directions however, one day, I decided to test out how accurate it was by using to drive home from work. I had it set to take major highways and such for quickest, linear directions but, for some reason, it kept telling me to take this left, go 100 yards, take a right, go another 200 yards, make a left and then make numerous left/right turns. It didn't hit me until about 20 minutes into this weaving pattern that there was a major road that went straight through all these left/right turns. It was at this point I realized that my map data was over 4 years old and it seemed like a good time to get a new GPS unit. Now, I have a TomTom with lifetime maps/traffic and all has been good now.