I tried using it in Bosnia, once, and it decided to use an abandoned airfield landing strip as a shortcut. Wild stuff.
I frequently drive through Serbia/Bulgaria/Montenegro/Macedonia, and if you ever do, do yourself a favor and install something OpenStreetMap-based.
Otherwise, you will be missing new motorways, get thrown on unpaved roads, or even asked to drive on roads that just do not exist anymore.
to be frank, I have a feeling that Google has more / better data.
I haven’t come across anyone using Apple Maps while living in Japan, most seem to use Yahoo! Maps or Google Maps.
Noone in my circle with iphone uses it. Most of people are using Yahoo maps, which is way better than google and apple maps combined.
And they are planning to make it even worse with ads, so.
However my biggest gripe with Apple Maps in Poland is that Siri does not understand Polish and cannot be told to navigate to a Polish address. It just can’t understand the street and city names :(
Btw: I haven’t counted the times Google Maps wanted me to go through the worst possible traffic jam (where the traffic jam was not visible on the map) or a closed road. I guess it just happens with every navigation system that errors happen.
Around here (Long Island, New York, USA), it’s better than Google Maps. I get to compare a lot, because I have a friend that uses GM, and constantly sends me Google Maps universal links.
I hear that it is a lot less effective in rural areas, though, and I think Google Street View is better than the Apple variant.
We might be kind of lucky in New Zealand with the yellow AA signposts at every intersection in the country telling you the nearest towns/communities and their distances in every direction.
Generally they are fine, but not literally in every aspect in every place, Europe or not.