I just ignore it when it's going on and on and I'm headed to a destination I know well. Or I'll turn it off when I'm within a mile or so, I just want to use the traffic awareness to make sure I don't end up in an unexpected jam.

One slight oddity - it doesn't seem to care about which side of the street your destination is on in a lot of cases. Sure, in a suburban neighborhood, that's irrelevant. But in a city with two-way traffic on the street, it can matter quite a lot.