I use mine every time I'm in a new place, though from now on, I'll likely use it whenever I'm on the road. Last Friday night I was driving back home and there were two complete stops on I85. One was on the GA side of the border - no idea what that was about. The second was about 20mi further on the AL side that had traffic backed up for ten miles, or more. The (phone) GPS pointed out the exact location of the tieup. If I'd been smart I would have gotten off and taken the back road. My wife was about 2mi ahead of me, though, and I decided to hang in.
Bad weekend for I85. Saturday, we drove back to Atlanta and there was a carbeque on our side that had the Northbound lanes stopped for a half hour.