Let me put it this way - no body i know that own a navigation system regrad their 2K decision (i mean the "factory" nav.).
Living in Los Angeles for 4 years, i know pretty much all the street 50 mile radius. But all i can remember are the big roads, don't forget there are always small streets you are not fimilar with.
Finding a location in Los Angeles is difficult. The road here are not straight north/south/east/west, they curves, merge with other road and seperate at a few miles down. one road might be cut off that you are not awared of and you are spending 10-20 minute to learn that while the navigation will tell you exactly what's going on.
Have you ever try to find a location on a fimilar road? # is 12345.....hmmmm.....lets see......5 is odd #, looking, looking, looking, finally there is a building has the # appear in the front (70% of time they don't). So 5 is on the left hand side. ok, now we are at 10123.....2000 down the road we will be there. 10223...10323.....10423......10523.......11000......2000.....2100....2200.....wait a minute, the # just reset itself. Pull over, look up the map, you figure out the place you are looking for is in the other side of town on the street that has the same name as this one.
This kind of situation happens alot in Los
Angeles as the #ing system is so screw up.
saying that much, it boil down to this - Navigation is no waste of money, but a very useful and fun tool to have.