My wife used Apple Maps for a while here in the UK and driving in Europe. The results varied between amusing and traumatic. No issues ever with Google Maps since she swapped (but I know from experience it's not perfect). Apple maps would send her over tertiary roads through mountain passes that were snowed out, instead of salted/gritted primary roads, would show major highway junctions wildly (dangerously) inaccurately and showed areas that had lots of properly mettled roads as open countryside with no thoroughfares at all.