This is a question to those who plug their smartphones in the AUX jack in their cars while using Waze: do you guys turn off your screens on your phones while you drive and only listen to the navigation?
For those who didn’t know, by plugging it into the aux jack, navigation will come out from your speakers 
I got the monster I cable for my iPhone and love how it plays over music. I typically don’t look at the screen but that was before my car mount came.
I plug into a specific iPhone jack for my stereo and i leave the screen on. I am more apt to watch the screen than to listen to the navigation.
The Waze speech engine isn’t the most pleasant and sounds really terrible (compared to Motion X GPS) when coming through my 1200 watt stereo system.