At best! I’ve tried for a long time to use it, but given up. It fails to find even well known locations in densely populated areas, directions are terrible, and in many cases you just get gray blobs where detail is crucial.
I use the web version of google maps more often than not.
The biggest problem with Apple maps is that it is terrible at working out where you want to go. You have to know the correct name that they have in their database. Google tends to have a lot more context, and so can often work out what you want, even if you don't know the exact name, and so can get you there.
Assuming that you can find the address that you want, then Apple Maps if good enough.
In Germany it works well. I actually think the lane indicators for navigation on the Autobahn are superior to Google Maps. If only I found a way to always have north up. I get super confused and lose orientation if my map is not properly aligned with north up.
The last few times I've used it in Europa it's given me the wrong location for an address or missing places. I agree that seems better than it was originally, but it just can't compete in a lot of locations.
It doesn’t even show subway station when unzoomed. And it’s one of the most important way to understand what part of the city you’re looking at. At least where i live.
I use the web version of google maps more often than not.