I've used Google Maps in London, Berlin, Washington DC, Chicago, New York, SF, Austin, and a few other places. Berlin and DC were probably the worst, but it still worked. New York (where I live now) it sometimes chooses the "wrong" bike path. For instance, it'll choose a non-protected lane and insist on it even though there's a protected, 2-way bike lane a block over that's much much faster and safer.

Then again, this is a really really hard problem to solve for, and Google probably has it the best no matter where I am, so that's what my default is. I'm excited to see how Apple's will work in iOS 14 though.