So you just follow the voice commands? In my experience it's simply impossible. Most common issues are:

• google says "at the roundabout take the 3rd exit" but the roundabout has an exit to a short service road leading nowhere or a one way road that's not really an exit. Do I count those two? Sometimes yes, sometimes no. Depends how those are mapped. Impossible to know without looking

• "In 50 meters turn right" but there two streets, one maybe 10 meters after the first one. Which one does it mean? If you're driving 40km/h it's impossible to tell without looking. It will say 'turn right' in almost exactly the same moment for both streets

• "take the exit" but the road splits right after exiting. which way do I go after exiting? Sometimes it will say "exit and keep right", sometimes no. depends on how those roads are mapped.

I prefer to just look at the screen from time to time. With a good map a quick glance clarifies everything. With google maps trying to figure out what's going on when it's suddenly not clear where to go is much harder. But I probably depends on the town you're driving in and how used to it you are.