n=1 but the built-in Maps on iphone seems to be fine these days. Doesn't steer me wrong, integrates with a car. Not sure what the moat here is other than name recognition or current popularity. Perhaps app integration or API consumption?
But where Google Maps still dominates is in its unrivalled, global point of interest (POI) data. Accurate business locations, opening hours, photos, reviews, etc... nobody else comes close.
Dallas has a lot of parallel highways/roads, and Apple Maps seems to get really confused and have to recalculate the route every few minutes when I'm down there. Google seems to understand it perfectly and simply doesn't do that.