Depends on your region. It is fantastic in Cupertino. It is literally unusable in Japan or Taiwan. Literally--it will fail to get directions or even find your destination (typing in English or the local language).
The only reason I ever use google maps is to search somewhere and copy paste the address into Apple Maps.
Can’t speak towards Japan or Taiwan specifically but it’s been fine in extremely rural Africa, India, Brazil, Indonesia, Bosnia, Australia, etc. Much better than Google Maps in most of Western Europe and America these days.