Google Maps has been awful for me lately. Missing turns, not being forward enough (as in, telling me "turn left/right after the current turn). It also has given me completely wrong instructions on where to go at the end of the route to get to the destination, one time even getting me there, having me drive by it, then go a few blocks down a residential street, and say "you've arrived".. when I was clearly not at my destination.
Might try Apple Maps again.