Here's what I want to know... Garmin doesn't RUN the GPS system, a division of the United States Military does. What I want to know is, let's say, (hypothetically, this is a laughable supposition) BMW adjusts his speedo so that it's "exactly" right. What happens when the government makes an adjustment to the GPS system (which is perfectly within their purview), and his Garmin is now x mph off (x = any figure other than four). From his perspective, his speedometer will now be "off" again by x mph. What's he going to do when his speedometer is now off again by said figure? Is he going to sue BMW? Is he going to sue Garmin (Garmin just passes along the signal it gets from the satellites, it doesn't wield any control or influence over the satellite based GPS system)? What happens when or if he changes wheels or tires? Am I the only one who understands how this person will be perpetually "chasing his tail"?