Garmin & Navteq
I have what purports to be a top of the range Garmin unit, its worse that my old and much lamented BM6300, however it does use the same mapping agency, I notified them of a error 10 years ago, this, like the correspondent above, has not been corrected, despite receiving an acknowledgement.
It fails to zoom in at slow speed (despite having auto enabled), the Navteq maps have junction errors too numerous to mention, for goodness sake, they could use Streetview to sort that out, I wish I had put the money towards a better and larger smartphone and use that instead.