The Waze satnav does stuff i ve never seen before. It communicates live traffic info, so if there is congestion, it redirects you around it.
But this one got to me. On the motorway, it warns you that a car is broken down on the hard shoulder a mile before you get there. That is something i,ve never seen a satnav accomplish.
Likewise Googlemaps warns you when a mobile speed camera van is ahead. That is surprising as there are 8 locations they use, but the live feed tells you which location the van is parked.