My 05 car's (I bought it used much later) navigation is way better than Google Maps at keeping a GPS fix and giving clear directions. If I could get new map data for it I would use it instead of my phone.
Has Google Maps got worse in the past few years? It's been jumping streets, giving turn directions that change at the last minute or upset it into recalculating even after the turn for me. I thought it was much better a few years ago.
Main issue to me is that in my experience unless I put the phone on the dash (where it can easily overheat in summer unless I put it right on the aircon vent) the phone doesn't grab the gps satellite signal that easily.
