I use the Garmin plus Waze. Both are life-savers when used in tandem.
Waze has let me avoid major back-ups from construction and accidents real-time while the Garmin makes sure the alternate route is ok for my coach.
I use Waze because I find the Garmin Traffic feature not to be as real-time and accurate as Waze.
Make sure to update the Garmin from time to time. They do make improvements to the routing software and the maps. I hadn't done an update sine last summer and just checked the other day and it did a major update to the unit's firmware and the mapping software.
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