Not really hard proof but anecdotal, but my dad and I were driving from Cleveland to Nashville and neither of us really had any idea how, since we've never been to Nashville before. My dad has a Garmin, and he just plugged in the address of our hotel in Nashville and it seamlessly and perfectly got us there. No hiccups, no lag, adjusts to human error (my dad ignored it once, lol) really easily and quickly. We made good time–just about 8 hours.