I have had wonderful accuracy with Waze. In fact, the one instance where I had an issue (was told to turn left on a no left turn), I reported it (a well exposed

I have had wonderful accuracy with Waze. In fact, the one instance where I had an issue (was told to turn left on a no left turn), I reported it (a well exposed feature in the app) and it was fixed by the next time I drove by. I think that's the real win with Waze as far as mapping goes (the realtime traffic awareness is the number one feature over all): it's crowd sourced so problems can be reported and will be fixed by community map editors (similar to the Wikipedia model).